For a small, high revving engine, what quality to look for in oil?

[tai]

Rich, glad to see another Miata owner here. You know what it's like to make sure it's getting taken care well.

Definitely I'm using synthetic. 0w30 right now, and either 10w30 or 10w40 when it gets warmer.

 

[Bror Jace]

Getting back to the original point in this thread, you can't really judge an oil by its printed property values. They may change radically when the engine is run ... especially at high RPMs. Some VII are designed to shear down quickly making some 5W30s into 5W20s after just 1,000 miles.

Also, additive packages tend to make or break oils. Moly is a good thing ... and more and more companies are using this. Valvoline is the latest to come into the fold but I'm sure there are plnety of (indifferent quality) batches of oil still on the shelves across North America.

So, what would I use in that car of your in Texas? Red Line 10W30 for intervals 5,000 miles and over. Very, very stable.

If you want to go with short intervals (less than 4,000 miles), use Schaeffer Supreme 7000 (synthetic blend) in 10W30.

--- Bror Jace

 

[Quick_lude]

For the Honda guys, I might be getting the RX-8 a year from now, with a 9-10K fuel cutoff. Can't wait until I get to rev that engine up..

Only thing is I think Mazda will recommend dino oil due to the fact that the synths do not burn up as easily in the combustion chamber.

 

[tenderloin]

Use 0W-20. Your engine will noticeably rev easier. More MPG. I use Synergyn, but Mobil 1 will be out next month. You can tell the difference.

40W?????? LOL

 

[S2000driver]

If I'm not mistaken, this is a rotory engine. The moving parts are all quite different, much less reciprocating motion. A higher redline should be a piece of cake. Also, the hp/l is typically very high because of the combustion cycle.

quote:

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Originally posted by Quick_lude:

For the Honda guys, I might be getting the RX-8 a year from now, with a 9-10K fuel cutoff. Can't wait until I get to rev that engine up..

Only thing is I think Mazda will recommend dino oil due to the fact that the synths do not burn up as easily in the combustion chamber.

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[tai]

quote:

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Originally posted by tenderloin:
Use 0W-20. Your engine will noticeably rev easier. More MPG. I use Synergyn, but Mobil 1 will be out next month. You can tell the difference.

40W?????? LOL

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Oh, I'm sure 0w-20 will rev easier, but don't you think it'll shear down more easily as well, and thus not protect the engine as you desire. Or are the 0w-20's available made from a better stock to begin with, and thus we're comparing apples and oranges then discussing 0w-20 vs xx-30 oils.

After all, isn't Pennzoil 0w-20 come from a better stock than the rest of the PureBase oil line?