Questions regarding the engine lubrication system

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1answer
3k views

What happens if petrol is used in a diesel engine?

The question is asked for various proportions : - 10% of petrol - 50% of petrol - 100% of petrol in a diesel engine. PS : not a duplicate of What happens if unsuitable oil is used in a vehicle ...
8
votes
4answers
3k views

Is it normal for the oil to be dark in color right after an “oil change” in a 10-year old diesel car?

I took my 2002 Jetta TDI wagon to a neighborhood shop about 10 miles, 24 hours ago. They supposedly changed the oil, but the color is very dark, almost black. Definitely not light-colored/transparent. ...
3
votes
2answers
941 views

accidentally placed oil in the coolant reservoir in a BMW 325i. How do I fix it and what is the cost?

I accidentally added oil to my coolant reservoir. I have a BMW 325i. The oil light came on and I figured my oil may be low. When the oil was added the oil light warning went off. However, the ...
1
vote
1answer
306 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 ...
3
votes
2answers
1k views

BMW E30 M20 oil warning light goes on on hot days but the motor sounds and performs fine

The car: BMW '90 E30 320i Cabrio with the six-cylinder M20 engine. The problem: the red engine oil warning light inside the instrument cluster (not the check control) lights up after some driving. ...
3
votes
2answers
244 views

Synthetic Oil and oil change frequency

My car (a 2008 Scion tC) says to have its oil changed every 5K miles or 5 months. I just took a new job and commute into the city by bus so I'm driving a whole lot less. I was told that if I got full ...
3
votes
1answer
158 views

Cleaning a Jerrycan

I have a couple of 10 Litre steel jerrycans which I used for draining kerosene (UN1223 28sec burning oil) from a tank. After disposing of the kerosene I left the open jerrycans upside down over some ...
0
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2answers
757 views

Nissan Pulsar ST1.8 oil filter change

First time replacing oil filter and oil. I've drained the old oil from the oil tank and I now want to remove the existing filter. For the life of me, it seems as though the filter is in the most ...
3
votes
1answer
147 views

Cannot Pull Oil Dipstick

Here's a simple, yet frustrating, problem. I cannot check my oil, because the dipstick is stuck fast to the tube. I don't really want to pull and twist so hard that it breaks off.
0
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2answers
2k views

What is an oil catch can for?

Some RX-8 owners have been recommending installing an oil catch can, to prevent problems from "overfilling" the oil. I assume this doesn't mean spillover (does it?), but instead, too much oil in the ...
3
votes
2answers
7k views

Accidentally poured engine oil into the coolant reservoir

My 1990 Mazda 626 leaks oil like a sieve, so I regularly top up the oil. In a moment of stupidity, I opened my radiator cap instead of my oil cap while topping up my engine oil, and poured about ...
4
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2answers
54k views

Will Putting An Extra Quart of Oil In My Car Ruin It?

I put too much motor oil in my car's motor. About a quart - have I ruined my car? I've been driving it. I know I need to get the oil drained. But I'm worried that I've ruined my car which has been ...
10
votes
3answers
3k views

Is it OK to mix oil of different viscosity?

I have a Mazda RX-8 (with a Wankel rotary engine). Mazda advises North American owners to use 5W-20 oil. The engine was just replaced 200 miles ago by the dealer so it currently has 5W-20 in it. ...
1
vote
1answer
284 views

Check Oil Light Stays on for 20+ Seconds When 2004 Trailblazer Starts

Lately, my 2004 Chevy Trailblazer has been displaying the "Chk Oil" light when the vehicle first starts up for more than 20 seconds - much longer than the normal dash light test. Then is turns off and ...
4
votes
2answers
601 views

Are there different kinds of 10W-40 oil?

I was given a used riding mower as a gift, and the other day I started to do some of the yearly maintenance as recommended by the owner's manual. When I got to the part about changing the oil, I saw ...
2
votes
3answers
2k views

Blue-ish smoke coming out from the exhaust

I have a VW Golf mk4, 1.9 TDI from 2001 with 230.000+ km on board and for some time now I have blue smoke coming out of the exhaust. The problem aggravates when I'm stuck in traffic or when the ...
1
vote
1answer
167 views

2004 Buick Ranier Oil Filter Location

Changing my oil right now, but can't seem to find the oil filter on my 2004 Buick Ranier V6. Any ideas? I don't have it up on stands
3
votes
3answers
760 views

how to clean up spilled oil?

I changed the oil in my pickup a couple months ago, and had about a quart of clean oil left in the container when I was done. I don't have a garage or other handy place to keep stuff like this, so I ...
1
vote
3answers
3k 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 ...
4
votes
2answers
12k views

Oil in coolant - how much trouble am I in?

I have oil in my coolant reservoir. Could it just be the head gasket or is it almost certainly the entire engine or might it be something else entirely? Thanks in advance...
2
votes
4answers
613 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 shot trips in the car? My daily routine means that the trip to work goes via another destination which gives my ...
2
votes
0answers
282 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 ...
4
votes
2answers
1k views

oil leaks when driving, not while parked

My wife has a 2004 Mazda 6, 2.3 liter 4 cylinder. When the car is parked, oil doesn't pool underneath. After driving for about an hour, we need to add about 1-3 quarts. With this issue, where could ...
3
votes
2answers
5k views

Which provides better engine flushing, traditional flushing oil or adding a flush additive to old oil?

Background I think that my vehicle would probably benefit from having it's lubrication system being flushed out at it's next oil change. Checking prices of flushing oil at local suppliers I noticed ...
2
votes
3answers
1k views

Audi A4 (1998) extremely noisy when idle, occasional oil light

I have an Audi A4 1998 with over 200k miles. It gets extremely noisy when idle. It usually doesn't happen until it has been running for a while. Revving above 2000rpm can settle it and it isn't noisy ...
3
votes
1answer
2k views

High / fluctuating oil pressure causes?

My girlfriend has a 1997 Pontiac Bonneville SSE (3.8L GM 3800-II, non-supercharged). It ran low on coolant a few weeks ago, and started to overheat. I refilled with coolant, but the next time I was in ...
3
votes
1answer
2k views

Oil leak - just keep refilling?

I have a 1995 Honda Accord with over 170k miles on it. I have the oil changed regularly every 3000 miles. My mechanic noticed the oil levels were pretty low at each oil change and took a deeper look. ...
3
votes
2answers
1k views

Is the vent from the pcv valve back into the air intake really needed?

After working on my car, I didn't bother to reattached the line from the pcv valve into the air intake before testing the motor. It ran normally. This made me question whether I need to even return it ...
1
vote
3answers
632 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 ...
18
votes
4answers
11k views

How far can I drive with 1 gallon too much oil?

I have way too much oil in my Acura TSX. Do I need to take care of it without turning it on or can I drive it to a service station? If I need to do it in place, I don't have the ramps or a pan or ...
8
votes
4answers
3k views

How do I select the right oil for my car?

I can give you my cars make and model and the conditions that I drive in, but I'm looking for a general guide to selecting the right oil for a car. I'm not really knowledgable when it comes to cars so ...
5
votes
2answers
281 views

Oil pressure question

I am driving a 1995 Bonneville and, lately, whenever I am idle, at a stoplight for example, my oil pressure drops and my check engine light comes on. Any ideas on why this could be happening?
13
votes
4answers
16k views

What are the risks of overfilling a small engine with oil?

I recently overfilled a 4 stroke lawnmower engine with oil. It has been run for about 1.5 hours while overfilled. It smokes a lot right after being started but after 30 seconds or so the smoke clears. ...
7
votes
2answers
2k views

How does the change oil light system work and does it matter what type of oil you use for it to work properly?

I want to know if the methods a vehicle decides when to turn on the oil change light have to do with the qualities of the motor oil used in the last oil change. I have heard that the vehicle's ...
4
votes
3answers
913 views

What kind of engine oil to run a Diesel?

I got an 1987 Toyota Land Cruiser with a 2H diesel engine. I never changed oil on a diesel engine prior to this truck, so I'm a little confused. Toyota Factory Shop Manual recommend API CC oil type, ...
5
votes
3answers
678 views

What happens if unsuitable oil is used in a vehicle engine?

I recently heard an urban legend-like story about a guy in a developing country who decided engine oil was too expensive and so used some vegetable oil instead. The story says the car ran for some ...
2
votes
1answer
478 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 ...
4
votes
2answers
2k views

Oil leak when parked on steep incline

The other day I parked my car, and came back a couple of hours later to see a massive oil puddle under my 1994 Corolla. This was the only time I had ever noticed that much of a leak, and I realized it ...
19
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2answers
2k views

Do I have an oil leak if I have to add oil?

I don't change the oil all that often (maybe every 8000 miles) and on my 10 year old car the oil light comes on and I need to add a quart or two (and then I start thinking I practically changed the ...
2
votes
1answer
1k views

High oil pressure after oil and filter change

I recently changed the engine oil and filter in my Westerbeke diesel. I gave it the usual (and specified) 4.5 quarts of SAE 30, specifically Chevron DELO. Now when it starts up it reads 80 psi of ...
9
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2answers
3k views

What differences between synthetic and dino oil?

What are the main differences between synthetic and dino oil, and is one always better than the other?
4
votes
2answers
470 views

Which oil grade and kind should I use on a sport car that does amateur drag?

The car is a Dodge Neon SRT-4 with about 81,000 miles that is used for amateur occasional drag. What grade and type of oil would be the best to improve my performance while still preserving the ...
10
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3answers
3k views

Is it worth switching to full synthetic or blend oil in my older car/truck?

I have a older (enter vehicle here) that has 100k miles on it. Would I see any benefit switching to full synthetic or synthentic blend oil? Is it worth the extra cost in an older vehicle? For ...
3
votes
1answer
450 views

Should oil be changed every 3000, or 5000 miles? [closed]

I've always heard that the oil in a car should be changed every 3000 miles, but I read the manufacturer's suggested maintenance guide, and it says to change it every 5000 miles. Which is correct, or ...
7
votes
5answers
206 views

How can I know if the right oil has been added to the vehicle?

Considering that the car recommend Mobil 1 Synthetic oil as per the logo on the oil cap, how can I be sure that the garage that did the oil change poured the recommended oil and not another low cost ...