6G Celicas Forums

Holy cow, this thread took off while I wasn't looking....

Yeah, there was definitely about 5 quarts in there when I drained it, and that was after I'd been driving it for maybe 2500 miles or so, and the smoking on startup only happened maybe a month before the oil change (I wanted to catch it right at 90,000 miles so I could keep track of the 3000s.) The manual says only to put in 4 quarts, which is why I was suspicious. I just use regular motor oil, but I change it religiously every 3000 miles.

Mixing regular and synthetic is bad for 2 reasons. Not all oils can mix together, if you mix synthetic and regular together it could seperate much like oil and water seperate causing damage.

Also using synthetic or regular in an engine that has had the other in it for some time, can cause your seals to swell or shrink causing leaks.

And our cars only take 4 quarts of oil, it is a waiste to put more than that in it. My 4.0 inline 6 only took 6 quarts and it was twice the size of the engines in these cars.

i THINK the exact amount for our cars is like 3.75 or 3.8 ....i read that somewhere 1 qt per cylinder isnt exactly true

Too much will cause trouble, if its full enough to touch the crank, the crank can stir it hard enough to foam, causing excess crankcase pressure, which can force oil out thru otherwise good seals, PCV also sucks more thru as there is more airborne oil in the craqnkcase, also you lose horsepower trying to spin the crank thru oil, you can also get it too full to the point its hydrauliced from the bottom, and it won turn over, or if it does, oil comes out everwhere

As for synthetic oil, it actually will leave a film to help protect against dry starts. (At least Amsoil synthetics do). And the bit about the seals swelling or shrinking really shouldn't apply anymore, The first synthetics years and years ago had problems with that, Amsoil fixed that years ago, I would imagine the other brands have too, (dont know for sure).

More info From the Amsoil site: Amsoil info

Frequently Asked Questions


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You can order products directly online by clicking on the Online Store link at the top of every page on our website. Or click on Preferred Customer Orders to get info on receiving a discount.





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Can I use AMSOIL AFF 0W-40 in my new 4-stroke snowmobile?

Absolutely! AMSOIL AFF 0W-40 was specifically formulated for use in small, hard working 4-stroke engines. AFF is ideal for 4-cycle snowmobiles, ATV's, personal watercraft, 4-stroke boat motors, lawn equipment etc...


Can I use AMSOIL AFF 0W-40 in my car or truck?

AMSOIL AFF can most certainly be used in cars or trucks but it is not our first choice for automotive applications. We offer a full line of automotive oils. AFF is specifically formulated for small recreational 4-stroke engines, and is an excellent choice for 4-Stroke outboards, ATVs, lawn equipment, snow blowers etc….



How long have AMSOIL lubricants been on the market?

AMSOIL introduced the first synthetic motor oil with an API (American Petroleum Institute) Service Classification in 1972. Since that time, AMSOIL has varied and expanded its product line.

What are AMSOIL Synthetic Motor Oils?

AMSOIL Synthetic Lubricants are fuel efficient, extended life lubricants manufactured from select synthetic base stocks and special purpose additives. These lubricants provide improved overall performance characteristics when compared to conventional petroleum oils.

What are AMSOIL Synthetic Blend Motor Oils?

AMSOIL Synthetic Blend Motor Oils are a blend of synthetic fluids and petroleum oils. They are combined to form an all season motor oil that demonstrates many of the performance features of synthetic lubricants.

Can AMSOIL Motor Oils be used in any engine?

Certainly, AMSOIL Motor Oils may be used in any mechanically sound gasoline or diesel fueled engine. Basically, that means they are excellent for use in any vehicle’s engine.

Will AMSOIL Motor Oils void the warranty of a new vehicle?

Absolutely not! Manufacturers’ warranties are based upon the use of oils meeting specific API Service Classifications, for example, SJ/CF. (AMSOIL lubricants meet the current API Service requirements and, thus, are perfectly suited for use in any new vehicle without affecting the validity of the new vehicle warranty.)

Are AMSOIL Motor Oils All-Season Oils?

Synthetic oils are made to protect and perform better than petroleum oils at both high and low temperature extremes. That’s why every jet engine in the world is lubricated with synthetic oil. AMSOIL Motor Oils have extremely low pour points and flow readily at extremely low temperatures for easier winter starting and significantly reduced engine wear. At high temperatures, no conventional motor oil can compare to the overall protection AMSOIL Synthetic Motor Oils provide. That’s extremely important for today’s turbocharged and small, non-turbocharged engines!

Are AMSOIL Motor Oils compatible with other motor oils?

Yes. AMSOIL Motor Oils are compatible with all other synthetic or petroleum motor oils.

Why are AMSOIL Motor Oils capable of extended drain intervals?

AMSOIL Synthetic Motor Oils are highly resistant to the destructive effects of heat, and do not break down like petroleum oils. This means that AMSOIL Motor Oils can provide much longer drain intervals than conventional lubricants.

Will AMSOIL Motor Oils decrease oil consumption?

Yes. When used in mechanically sound engines, AMSOIL Motor Oils can reduce oil consumption. Under test conditions, a reduction of as much as 42% was demonstrated for prolonged periods. However, this should not be taken to mean that AMSOIL Motor Oils are “cure-alls” for engines that consume oil because of mechanical problems.

Is there a recommended procedure for changing to AMSOIL Motor Oils?

There are no special requirements; however, in older vehicles or those with high mileage, it may be advisable to use AMSOIL Engine Flush first. This will ensure that the engine is clean and free of any accumulated contaminants which might have an effect on the service life of AMSOIL Motor Oils. In all cases, it is good judgement to install a new AMSOIL Super Duty Full-Flow Oil Filter (SDF) every time you change oil.

Should Oil Additives or After Market Products be added to AMSOIL Motor Oils?

No, they are not necessary! AMSOIL Motor Oils are properly formulated under the strictest Quality Control procedure to provide superior lubrication performance.



And yes, I am an Amsoil dealer, have been since about 1978, I simply will not use anything else in a motor. My website: My Amsoil site

I'd appreciate linking thru my web site to buy online, (I get a small commission) (you could too, if you become a dealer), or at least buy it wholesale by doing the "preferred customer" thing online.

Sorry to start preaching, but if you aren't using a good synthetic, you are losing HP, using more fuel, and wearing out your motor. (and transmission etc) ((not to mention all that extra oil either dumped in the environment or needing to be recycled.

if you put to much oil in your car it dosent just burn off it also ruins seals(crank seals), raises oil pressure, and lowers power because the crank has to spin through all of it.

also the best oil to use in your car is the one that the MANUFACTURER RECOMENDS they are the people that made the engine and did all of the testing on it and tried it out with a ton of diffrent oils, they recomend the best oil for that engine because they dont want to pay for it with a warrenty claim.
some synthetic oils are also known to brake down some seals in youre engine, and can hurt it more than help it.
switching between synthetic and regular in my opionion is ok if done it many times, if you put both in your car at the same time with the right mix of oils they can also foam real bad