windhund116

Anyone here tried running straight 30W oil (not synthetic) --- in oil burning, S2000s with tired engines? Since, bearing surfaces may already have borderline tolerances, don't think heavy oil in the morning can do more damage. Something like Valvoline Racing 30W or even 40W?

http://www.amazon.com/Valvoline-VV22...racing+30w+oil


Old school way to keep from adding oil, all the time. Just curious.


Thanks!

zeroptzero

Regular multi-weight oil is still very thick at room temperature i.e. 70 degrees or colder, it only becomes thinner when the engine is fully hot. So you are still getting a very thick oil at cold starts with any 10w30 oil. An engine is always better getting oil flow as quickly as possible at start up IMO. I'd rather run a multi-grade 40 weight oil if you want more viscosity, while still preserving cold start oil flow. There isn't much you can do to solve oil consumption on a worn motor, it is what it is. Racing oil is best used in racing applications and racing motors, it isn't really designed for street driving applications.

rrounds

I have found that 10/40 high mileage oil helps with engines that use oil.

ROD

B serious

A straight 30 is only thicker below operating temp. It won't help consumption and will likely cause other problems.

10W40 or 0W40 oils that are on the "thick side" of 40 will be better.

windhund116

Yeah. Maybe straight 40W.

zeroptzero

I would go with this if it was my car.

s2000Junky

No. 10/40!

windhund116

Why 10W-40? The engine is already burning excessive oil. So prolly tolerances are not an issue. The damage has been done.

I figure if the engine is passing oil --- there is less lubrication, prolly less oil pressure. The idea is to lower oil consumption. Keep the lubricant in the engine... instead of burning it out the exhaust. Keep the oil pressure up.

B serious

Again....10W40 is only thinner BELOW operating temp as compared to straight 40W, apples to apples.

s2000Junky

Because you are getting no benefit of the strait weight oil at operating temp, but at 20-30w increase in the cold flow rate you will kill your motor off. Your line of thinking makes no sense when you understand what your actually achieving.

You know what ran a strait 30 weight? A Chevy pickup truck from the 40's with a strait 6 and push rods and your sisters bracelet for piston oil control rings. And they burned oil right off the show room because of the loose tolerances made to run on that soup. So it wasn't even good back then, however its all they oil they had to choose from.