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Questions tagged [oil]

This tag should be used for anything related to the use of automotive engine oil, or in reference to other parts of the car that also require lubrication using oil.

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3
votes
1answer
40k views

Low oil pressure, car doesn't start. Have I damaged my engine?

I have a 97 Cherokee. It was stolen for a few weeks, then I got it back and left it idle for another two weeks. I knew it had an oil leak, but I didn't realize the extent of the leak until my car ...
5
votes
2answers
4k views

Did the mechanic ruin my car with double dose of oil?

I brought my new car in for its 3rd oil change. When I was driving back to work the car started sputtering and billowing black smoke out the tail pipes. I brought it back to the dealer and they told ...
4
votes
1answer
388 views

Engine oil requirements

I ride a 2015 Yamaha FZ-07 (around San Francisco / Bay Area), which is water-cooled and supports 10w30, 10w40, 10w50, and 20w50 motorcycle oils. However, the manual says not use 10w30 oil when the ...
6
votes
2answers
2k views

What's generally on the other side of the oil filler cap where oil is poured?

I'm curious: When I pour oil into the engine via the oil fill port that my oil filler cap seals off where does all that oil go initially? What parts get first dibs on the oil before gravity pulls it ...
4
votes
4answers
629 views

Dipstick Readings

My dipstick is reading lopsided no matter how many wipe, insert, wait and reads I do. On the front side the level is in the cross hatch and halfway up one side of the stick. The back side shows just ...
6
votes
2answers
1k views

Should I have run out of engine oil?

I have a Holden Captiva 5 LT (2013, petrol 4cyl) I had noticed the other day that my light for "Dangerously Low Oil Levels" had come on. From my limited knowledge of cars, If my oil was filled last ...
21
votes
4answers
3k views

proper oil for 1940's era aluminum ford engine

I would like to know the proper oil to use in a Ford GAA engine from around 1945. Could be as late as 1958. From a series of photos of a GAA being restored on Flickr. Currently this engine has all ...
4
votes
1answer
399 views

2002 Ford Focus SE. Too much oil?

The car was making clicking sounds and I checked the oil. Seemed to not registered much on the stick. I added 3 quarts of the proper oil and drove down the road. Within 1/2 mile it was sputtering and ...
8
votes
2answers
226 views

What happens if I use the wrong weight of oil?

Inspired by this question about how newer cars tend to specify lower oil weights, what would happen if you took one of those cars to an oil-change place, and instead of checking to see what weight of ...
4
votes
1answer
257 views

How often does engine oil need to be replaced if the car is barely used?

I have a Toyota with a 2001 engine in it. I have a trip coming up, and last changed the oil about 3 months ago. During these three months, I've driven the car no more than 200 miles. Do I still need ...
4
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0answers
305 views

'05 Peugeot 307: Oil in the Coolant

I have a 2005 Peugeot 307 hatchback. Back in May, the head gasket blew so I had it replaced. When the head gasket blew, oil was leaking out and the coolant became very gungy. This gunge was cleared ...
2
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0answers
2k views

Affect of burning oil on O2 Sensors

I got a P0420 code and took my car to have a service and an investigate. I was told my car failed an emissions test and that is likely because the O2 sensors have failed causing a rich mix and higher ...
10
votes
1answer
657 views

Why are recommended oil weights lower for many newer cars?

I've noticed that the recommended motor oil weights for cars in the last 5-10 years are often lower than earlier models. It seems like 10w-30 used to be almost ubiquitous in the 80s and early 90s, but ...
5
votes
1answer
71 views

Do good shocks have any oil below the top half?

Is oil below the top half of shocks indicative of failure, or is it supposed to be visible? One repair tech said that any oil below the top half of a shock indicates failure. Another repair tech ...
3
votes
2answers
1k views

Stripped Threads on inside of Oil Drain (Motorcycle; '72 Honda CB750)

I recently bought a '72 Honda CB750. There is a small oil leak (just a consistent but seldom drip) from the oil drain plug underneath the bike. The other day I went to change the oil for the first ...
4
votes
1answer
596 views

What Color should Oil Be in 2006 Duramax after Oil Change

I just had the oil changed in my 2006 GMC 2500HD Duramax diesel, my truck has 56,000. miles on it. The oil look on the dip stick looks really black! I feel like it wasn't changed at all. What ...
6
votes
1answer
2k views

Holden Captiva - Lots of oil pouring out the radiator expansion tank

On my 2012 Holden Captiva 2.2 diesel car the radiator expansion tank has filled with engine oil and now the oil is pouring out of the expansion tank. I am at a loss to why/how this has happened. Any ...
3
votes
1answer
59 views

2010 Toyota Corolla 4-cylinder

Has had regular oil changes... noted oil very low. Added oil. How will I know if there's damage done? Prior the car was making a fine sound with acceleration...now its quiet. I noticed there's a ...
5
votes
2answers
716 views

Effects of higher oil viscosity

After reading "Can viscosity affect gas mileage?", it appears that it can affect gas mileage. However, what would be the consequences of going from the manufacturer's recommended 0w-20 to the 5w-40 ...
1
vote
1answer
63 views

Topping off with lower viscosity oil in my Jeep?

I just ordered some 5w-30 for an oil change in my 4.0L 2004 Jeep TJ. This is what the manual calls for when using the car in sub freezing temps, which it will be for most of the next few moths up ...
3
votes
0answers
150 views

high oil consumption and oil pressure, possible PCV system malfunction

I have a 1993 C1500 4.3L manual transmission. My oil pressure has been reading very high (fluctuates, but generally goes beyond the upper range of the gauge). I had the truck in the shop and the ...
4
votes
2answers
820 views

Blue smoke coming from exhaust

I have a 2000 Toyota Sienna Le and every morning for the past month when I start my car a ton of blue smoke comes out the exhaust for about 2-3 minutes and it slows down. I've recently gotten a oil ...
3
votes
2answers
9k views

Mixing synthetic and semi-synthetic oil

I have a 2005 petrol C4. The car is supposed to have 5W-40 in it at the moment. I have a tiny oil leak which would cost as much as the car to fix, so the cheaper solution is to top-up the oil every ...
6
votes
1answer
1k views

Can the viscosity of the oil affect gas mileage?

If a manufacture recommends a certain weight of the oil for the engine, lets say 5W-40 and instead 5W-30 was used, would the gas mileage of the engine increase as the piston does not have to do as ...
5
votes
2answers
9k views

Oil leak after oil change

Had my oil changed, went home, went back outside later, and found a puddle of oil under my truck. I called the shop and they said bring it back again. Then they told me that someone had put an ...
3
votes
1answer
161 views

How much damage did I do to my engine running for 20 minutes on only a quart of oil?

I was doing an oil change to my car and did not realize I did not have enough oil for the engine, only a quart. I added what was left and did a 20 min trip to a gas station to buy oil so I am ...
3
votes
1answer
1k views

Tell tale signs of a valve cover leak?

Car: 2008 Audi S5 4.2L I found an oil leak at the bottom of my car near the engine/trans, which lead me to believe the rear main seal. However, one mechanic told me it was the timing cover gasket, ...
3
votes
1answer
48 views

1999 Chevy Cavalier Oil Levels

I have a bi-fuel 1999 Chevy Cavalier. When the engine is stopped, the oil dipstick reads full. When the engine is running the dipstick consistently reads about 6 inches above the max fill line. It's ...
9
votes
2answers
551 views

Can leaky cylinder explain oil loss to burning?

One out of the 6 of my Toyota Tacoma cylinders is mildly leaking, as indicated by a cylinder leakdown test. While other cylinders are leaking only something like 5-10%, this one leaks about 20% of the ...
2
votes
1answer
4k views

Oil pressure light stays on for 4-5 seconds after cold start

I own a Suzuki Swift diesel. When I start the car in the morning during first time in the day, the oil pressure light stays on for 4-5 seconds after engine has started. Also when I restart the car ...
2
votes
1answer
6k views

Overfilled the engine oil by 400 ml

I own a Suzuki Swift diesel. The engine is Fiat MultiJet 1.3 with engine oil capacity of 3.1 litres and I poured in 3.5 litres and drove for about 50 miles. Will this hurt my car's engine ?
3
votes
0answers
6k views

Locked Motor - Can it be fixed without replacing the engine?

First of all, I WILL APOLOGIZE if I get too lengthy. Drove the car, parked and was away from it for about 10 minutes. When I tried to start it, lots of lights came on and went off right away but ...
1
vote
1answer
208 views

Long Term Motorcycle Storage

I have a first generation Yamaha R1 racing bike. The bike isn't worth much money, especially not in it's current condition. So instead of trying to sell the bike, I would rather keep it with a plan to ...
5
votes
2answers
205 views

Oil evaporates/burns-off (becomes thicker), should top-up be thinner?

I read somewhere that when the oil evaporates, the leftover oil is effectively thicker, e.g., to extrapolate, 5W40 may be closer to 5W50 after the evaporation takes place than before so. I use ...
9
votes
12answers
145k views

Is it necessary to replace an oil filter every oil change?

I understand the oil filter's job is to remove contaminants from the engine and that it holds some oil in it from the previous oil; however, is it really necessary to replace this every oil change? ...
5
votes
5answers
6k views

Can I use 15w-40 Shell Rotella diesel engine oil instead of 15w-30 for my 4G63 Mitsubishi gasoline engine?

I am planning to make a partial overhaul of my 4G63 Mitsubishi L3 van gasoline engine. Since it is an old model engine , i want to replace it with Shell Rotella 15w-40 diesel engine oil.
7
votes
2answers
25k views

Oil Cooled vs Water Cooled

These both are cooling mechanisms. One uses oil to cool whereas other uses some kind of water-based coolant. What are advantages and disadvantages of both in both technical and ownership point of view?...
6
votes
2answers
835 views

Options for catch can setup

I have an '04 Infiniti G35 6MT coupe, 97k miles, completely stock. I'd like to install a catch can to help diagnose and possibly reduce some oil consumption (Previous question with more details on ...
11
votes
5answers
3k views

How do I tell if I screwed up my oil change?

I just changed my oil in my 2500 HD Silverado for the first time by myself. I've changed my oil in a 2004 Toyota Camry a handful of times, but I always had a friend supervise me. I need to know common ...
3
votes
2answers
1k views

Oil light is always on (2006 golf 1,4i)

The oil light is always on in my 2006 VW Golf 1.4i. I have tried changing the oil pump, oil switch, and even putting more oil in, but the light remains on.
4
votes
1answer
6k views

Drove with extremely low oil, engine light on [duplicate]

I drive a 2011 Honda Odyssey. The last time I had my oil changed, they neglected to reset the oil change indicator (relevant because I'm assuming it would have come back on sooner when my oil level ...
5
votes
2answers
2k views

8-9 Quarts of oil in engine after adding a stupidly high amount. What kind of damage can I expect?

To preface this, I was a complete idiot. My 2002 Honda Accord was a couple thousand miles over the recommended oil-change period and I was being pestered about checking the oil, as it could be fairly ...
15
votes
1answer
37k views

If you change your oil with synthetic can you never safely go back to using conventional?

I know that sounds like a weird question but I was talking to my brother in law about oil changes and I mentioned that I almost always use Mobil 1 full synthetic. He replied, "make sure you keep ...
5
votes
0answers
4k views

Diagnosing oil consumption on Nissan VQ35DE (350z / G35)

I have a 2004 Infiniti G35 6MT coupe. Nissan VQ35DE engine with a bit over 156,000 KMs (about 96,000 miles). Since I bought it, I've noticed some oil consumption at a rate of about a litre every 4,...
5
votes
1answer
972 views

Can low gear oil cause a syncronizer not to work?

I've been having a problem for a while on my MTX Nissan Almera with only being able to engage fifth gear at specific speeds, around 68-72 km/h. I recently noticed while changing an inner tie rod dust ...
7
votes
1answer
5k views

Does R-134A refrigerant normally have oil (liquid at room temperature) in it?

Upon [legally] releasing some pressure from a car's (model year 2000) over-charged AC refrigerant loop that uses R-134A refrigerant, some of the released fluid surprisingly stayed liquid at room ...
2
votes
1answer
136 views

Checking oil on a newly-aquired used motorbike

I've recently bought a used motorbike and am unsure of how to gauge the age/condition of its oil: Neither did I fill the oil in the first place (so I don't know what colour it used to be) nor have I ...
5
votes
1answer
24k views

Is it safe to run a car with the oil level above max?

I drive an opel/vauxhall insignia. Often when i come to check the oil i find the oil level is above the max rating, I believe the oil level is also somehow raising (possible diesel slipping past the ...
5
votes
1answer
961 views

2011 Jeep Liberty ran without oil, did this cause my engine to blow?

I have a 2011 Jeep Liberty and the oil pan rusted out and it was driven for a while without oil. The oil pan was fixed a couple days later. This happened in April 2014, in Oct 2014 the engine started ...
3
votes
2answers
12k views

Is a greasy exterior a sign of bad maintenance?

All car's I've had (second hand and between 15-30 years old) have always had a greasy veil over engine components. I understand moving components need to be lubricated but this gives off the ...