Hey MrNickleye!

[scruffboy]

I did like you said and switched to Castrol High Mileage 20W50 for the summer. I get my next oil change in November and here in New York it starts getting cold. What would you suggest I use then? I thought you had said 10W 40, but someone told me 10 W 40 is not that great an oil and on some newer cars it could void the warranty.

Scruff

[mrnickleye]

10w-40 is fine. It will flow easier in the winter, as your engine will be running cooler. I would use 20w-50 in the winter only if your car burns or leaks a lot of oil. That would slow it down.

Some new cars are using 5w-30 oil, for 2 reasons.
1) because of higher emmision standards
2) tighter clearances in the engine.

If you check out an owners manual for any car (and mine was still available at Toyota, $15), you will find oil specs requirements listed for different temp ranges.

I believe 10w-40 is acceptable for everything from 20* to 90*F for most cars.

[scruffboy]

10W 40 for the winter it is. All these oil weights are available as both "High Mileage" or "Synthetic". I have 130,000 on my N/A engine. Which would you suggest I use. I hear such good things about the "Syntec" from Castrol, but a guy at the store told me to use High Mileage for my car. He couln't have been tryin to squeeze me for cash cuz the High Mileage is cheaper. Which do you use? Thanks.

Scruff

[mrnickleye]

I don't use syn oil on an engine with lots of miles. It is great for new, or very low mile engines. It lubes better, lasts longer, and runs cooler.

But an engine with miles on it has built up petroleum based residues and varnishes on all the surfaces. These built up deposits help take up loose clearances. Remove them, and your engine will break down quicker. Can you say "rod knock"?

That is why its not a good idea to use one of those engine cleaners in one with lots of miles on it.

If you want to clean out "some" of the sludge inside you crankcase, just add 1 qt of Dextron III ATF to your oil about 10 miles before you are gonna change the oil. (1 qt overfill won't hurt for this short time).

The ATF has more detergents than motor oil, but won't remove the varnish.

[scruffboy]

You always have excellent info. I have heard that one of the quickest ways to start hearing pings in your engine is to use one of those "injector cleaners".

There was a discussion here once about slick50 and u said u used STP. Is that an STP oil additive? If you find your way back to this thread let me know.

One more thing. In the owners manual, they say to use some rediculously high test fuel, like 97 or some crap. I don't think you would be able to find a fuel that high. For a non-turbo do you need to use 93-supreme or can you get away with 89-Plus?

Thanks Pal

Scruffboy

[SupraSaver87]

Ok,

I have to ask something here. I hear alot in here that you guys are not using NORMAL gas. Meaning you are going to the plus, or premium types. My question is this:

Q: Is it just personal preference, or should I be running Premium gas in my 165,000km, 64,000 (On the engine, turbo, and exhaust), or is it fine running on the normal unleaded gas?

Also would it be ok to run 103-108 octane fuel in my supra? I was thinking about using that one day when I am cruising around town...see what kinda power is unlocked. (If this will be detramental to my engine, please let me know, before I do something that I am going to regret)