Hydrocarbon based petrochemical used to lubricate components of an internal combustion engine.

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Why is my engine quieter with synthetic oil?

I just replaced the oil in my 2004 Jeep Wrangler today - I thought I'd give synthetic oil a try because there was a "Mobile 1 oil and Bosch filter" deal at my local auto shop. Until now I have ...
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5answers
1k views

How can I increase the life of my diesel engine when my car does lots of small trips?

What things can I do to increase the life of my diesel engine when I make lots of short trips in the car? My daily routine means that the trip to work goes via another destination which gives my ...
2
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2answers
33 views

Cleaning Oil Siphon Tube with Brake Cleaner? (Is brake cleaner oil-safe?)

I recently used some siphon tubing to remove some oil from my engine. This worked great until I realized I wasn't sure how I could clean the tube for reuse as I don't want to use a siphon tube that ...
2
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2answers
96 views

2004 Subaru XT under powered and smoking after oil change

Over the weekend I traveled home and back: about 140mi each way. About half way there the engine light came on, and, realizing it had been about 4500 miles since my last oil change, I added oil to the ...
2
votes
1answer
244 views

Should you put thicker oil in an older vehicle?

I use 5W30 for my 2007 Toyota Tacoma, which has about 120K mi. Someone told me that I should put 10W30 because the vehicle is "not very new". Is that a good approach? I've never had problems with ...
2
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2answers
199 views

What are the temperature ranges for different oil grades?

I was reading up on oil grades in wikipedia and was wondering what the operating temperatures are for the various oil grades. I'm wondering since the area I live in is a pretty Mediterranean climate ...
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4answers
3k views

Oil pressure warning light stays on longer after oil change in BMW 320d E46

I have changed the oil a couple of days ago, and I've noticed that the low oil pressure light stays on longer than normal. Normally, it goes out almost immediately (<1s) after starting the engine, ...
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1answer
747 views

2003 Honda Civic 1.7 vTec - White Smoke from the tailpipe

I have a Honda Civic 2003 gx 1.7 liter vTec stick shift 4 cylinder. Just today I had to put oil in my car. Drove for about 5 minutes got to a light and when I shifted into first gear a white cloud of ...
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1answer
531 views

Passat - Oil warning light on engine rev. Expensive fix?

looking to buy my first car, which is a daunting task for someone with little money and even less knowledge of motors. Seen this one on ebay, which ticks all my boxes but is cheap because: When ...
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2answers
54 views

Oil level increase and in few days drops to nothing

I have an 01 mustang gt . Two days ago I checked the oil level in the dipstick when my car was warm and it was way above the maximum level . I parked it and checked it again today the oil level was ...
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1answer
41 views

Milky Oil in the radiator - Mazda 323

My vehicle has oil in the radiator and I have checked the head gasket matter fact I replaced it with a new one and there still is oil In the radiator may I ask what could be another reason for oil to ...
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1answer
66 views

Causes for engine/oil gunk around bottom of engine bay

My 2007 Tacoma has a lot of engine/oil black gunk around the bottom of the engine bay (below the battery and that area). I'm talking about solid black. Could that be caused by a leaky oil pan gasket? ...
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1answer
94 views

How much more slowly do synthetic oils degrade compared to conventional oils?

I don't drive my car very often and in the 13 years I've owned it I think I only ever reached the 5000 mile limit once during a long roadtrip; instead I always end up driving only about 2000 miles in ...
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2answers
225 views

Car still burning oil after replacing head gasket and rings; what's next?

I have a 1991 BMW e34 525i with 374,000 km which burns oil. I don't have any leaks, and I have little smoke when I go uphill and accelerate. I have replaced the cylinder head gasket set and the ...
2
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1answer
82 views

Huge oil leak but plug still there

Just had an issue with my 2008 4runner. The engine light came on, and so I pulled over and checked the oil level. It seemed to not have any, so I added a quart. I looked under the car and saw that ...
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1answer
1k views

Do I need to add oil after A/C evacuation without replacing any parts?

My 1999 Suburban's A/C started to lose its cooling capacity last fall. In late fall it stopped cooling completely (there was a mechanic involved with other parts of the vehicle at the time). This ...
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votes
2answers
820 views

Can I use EP 80W/90 oil instead of EP90 oil?

I have a Belle MiniMix 150 110V Electric Cement Mixer the documentation says to use a EP90 oil in the gear box, but these days it seems that most outlets only sells EP80/90 oil. What is the ...
2
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1answer
636 views

2004 Ford Escape Reserve Coolant mixed with oil

I have been using my 2004 ford escape 4x4 v6 for nearly 7 years now since my dad gave it to me. I am not a very technical guy when it comes to car maintenance but I see to it that it is always ...
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2answers
156 views

burnt motor oil: do suspended particles burn off, too?

My 2008 Jetta SE, 2.5L, seems to be burning quite some oil — engine looks clean, and there are no spots on the ground, but I've already added a few extra litres of factory-recommended synthetic ...
2
votes
1answer
2k views

1998 Chevy Lumina won’t start, crank, or click

I have a 1998 Chevrolet Lumina and recently I have had intermittent starting issues. My brother and I bought a new starter and put it in and it still wouldn’t start. After replacing the starter we’ve ...
2
votes
1answer
136 views

Oil gauge needle is at highest point

I have an 89 Mercedes 300 SE and recently the oil pressure needle has been stuck at the highest point when I accelerate. The values on the gauge are 0 to 3. When I take my foot off the gas the value ...
2
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1answer
109 views

03 Ford Escape V6 Oil/Coolant/check fuel cap lights

I just had my oil changed and had coolant put into my car a few days before Christmas. Also, bought a new fuel cap the same day. All of these lights are still on and I have no idea how to make them go ...
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1answer
727 views

What causes mud in my radiator?

Ive changed my oil about one month ago but just recently my check oil light has started coming on and I started losing my heat. I thought I might just have low antifreeze but when I opened my radiator ...
2
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1answer
64 views

Oil cap has come off and oil has spilled after adding oil

I've opened the bonnet to discover that the oil cap is off, and oil is all over everything. How can I get it cleaned up, and what damage will it have caused, if any?
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4answers
3k views

Is starting idle RPM always lower in colder temperatures?

I've noticed that my 2008 Jetta 2.5L 5W40 generally starts up with an idle RPM of at most 1.2K RPM around the freezing temperature (say when the temp sensor reads 33°F), or even at just about 1K ...
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2answers
268 views

Audi A6 2.4L 99 - randomly sets off brake warning lights, no abs, no rpm, no A/C

Randomly while driving or standing still I get a bunch of warning lights that come on, beep and blink. Sometimes it lasts a few minutes, sometimes it will stay on for a few days of driving and turning ...
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2answers
47 views

Vauxhall corsa diesel leaking oil

I was driving to work this morning & my engine oil warning light appeared on my dash. I assumed it needed a top up. When Parking up at work I noticed that oily black water was pouring out under ...
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0answers
31 views

Are More Recent API Oils always “Better”?

The API ( American Petroleum Institute ) provides certifications for engine oil. Such certifications range from SA for 1930's era vehicles up to the current standard SN. The above linked document ...
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1answer
101 views

Ticking/clicking when accelerating 1997 Dodge Caravan

My caravan began ticking when accelerating yesterday. It ticks fairly loudly when accelerating and much softer and slower when idle, or slowing down. Ticks slow and steady when idle or in park. Does ...
2
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2answers
170 views

What are the effects of using HD-30 in a car which takes 5W-30?

I recently changed my oil, and I didn't have quite enough oil to top it off so I used HD-30 oil for my last .7 out of 4 quarts total. My car normally takes 5W-30 and after a little research I figured ...
2
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0answers
22 views

2001 Pontiac Grand Am - Oil in coolant

I just bought my car from a owner I noticed there was oil or what looks like oil in the coolant there is no coolant in oil and car doesn't over heat. It's a 2001 Pontiac Grand Am with 230,000 miles ...
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0answers
512 views

High oil pressure in a marine engine

High oil pressure in my marine Perkins 4108 diesel showing 80 on the gauge, oil and filters recently changed, wiring checked and ok it runs an alternator to charge the batteries and when disconnected ...
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1answer
392 views

Whining noise from valve cover region, Nissan Primera P11 1999

Recently I've been hearing a whining noise from the engine bay. After checking, it seems to come from the valve cover. I've checked the motor oil; level seems ok although the oil is black but not ...
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2answers
115 views

Why is there no explosion risk while there is a gasoil pre-pump immersed in the fuel tank?

Attached is the picture of a BMW 318 TDS Gasoil Prepump. That prepump is literally inside the sealed fuel tank. And it contains a small electrical motor, in which 12V of electricity is sent, mainly ...
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3answers
1k views

Where can I look to find what kind of oil I should use for my car

Right now I want to change the oil in my 2002 Kia Sedona but I have several cars and I'm never quite sure what kind of oil to use in them. What I'm really looking for is a link to a site that I can ...
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2answers
191 views

Motorcycle stalls shortly after starting

I have a BMW 2008 F 800 st and the oil looks watery. It stops pretty frequently after riding it around the block. When it stalls, after some hesitation, it will start again. I need an unbiased answer ...
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4answers
3k views

Hydrostatic transmission oil confusion

I have a John Deere LX176 lawn tractor and am confused about its hydrostatic transmission oil. The manual states that the hydrostatic transmission oil should be "SAE 10w30 engine oil with API ...
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2answers
56 views

What can I do with used motor oil?

Besides recycling? I've heard, for example, that I can use it to lubricate the drive chain (in a motorcycle / bicycle), but that doesn't appeal to me.
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2answers
2k views

Can camshaft seal leaking hurt timing belt and cause sudden engine breakdown while driving? - Volvo XC90

Volvo service told me that the camshaft seal of my Volvo XC90 needs to be replaced for $1000. I see no oil on the timing belt, its dry. It just has some black dust. If there is real leak, can it ...
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1answer
331 views

Does one have to change ester-based fully synthetic oils?

They say that ester-based oils are used in jet-engines, where the oil is sealed, and it never has to be changed. If I use an ester-based oil as the lubricant for my Jetta 2.5L petrol, such as the ...
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3answers
1k views

Do motor oil conditioners do anything, or are they just a marketing ploy?

It it worth using a motor oil conditioner? Do they actually help keep an engine running better, or are they just marketing ploys?
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3answers
6k views

Difference between “Hypoid” and “Limslip” oils

Recently I changed the oil in my vehicle's rear differential. The manual recommended the use of a "Hypoid" oil, but the guy at the auto parts store suggested a "Limslip" oil instead. I went along ...
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3answers
582 views

Old Cars Burning Oil: How much is too much?

I've heard that it's "normal" for older cars to burn a certain amount of oil and that it's not really a problem. My question is how much is too much? At what threshold does burning oil become a ...
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3answers
2k views

What to do when antifreeze is in the oil casing

My son accidently poured some antifreeze into the place where the oil goes now the car runs with ticking when its idle
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vote
2answers
28 views

Sealing two stainless steel cylinders

I have 2 stainless steel cylinders (very thin) that I want to fit together. One has a diameter of 10cm and the other a bit more (around 11cm). I was thinking of sealing them together with an O-ring, ...
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1answer
1k views

At what level does low oil prevent vtec from working?

Just got my first vtec honda and vtec isn't kicking In and before I take it to my mechanic to see what it is I'm curious to know how low the oil has to be to effect the vtec. My oil level is just in ...
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2answers
473 views

Cream on oil cap? How to maintain a car that drives only short distances in Nordic environment?

My friend needs a car for night-time driving for distances about 15 km to-and-fro for his work. I read that short distances may be problematic to cars because the engine does not get hot enough -- ...
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1answer
65 views

Oil in coolant after gasket work 1995 Chevrolet Lumina

I had a coolant leak that turned out to be a bad gasket. Coolant was leaking into the motor. I had the gasket replaced, and was told to change the oil after a few hundred miles. When I did, it turned ...
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1answer
575 views

How to clean/dispose of oily/greasy shop rags?

I have some rags (as I'm sure we all do) that are covered in oil and other various fluids. Is it alright to wash these in a standard washing machine and then air dry them? Is there a specific ...
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2answers
968 views

What are the reasons to mix oil & coolant?

Frontal impact vehicle is there fan motor touches the oil cooler,oil cooler slight impact is there, in coolant tank oil and coolant mixed, what are the reasons to mix the coolant and oil in this ...