What type of oil should you use on an 89 vert. nonturbo

 

Castrol 20-50!

 

I was told only to use mineral-oil in my n/a and rotary in general, I use only high quality oils just to be safe.
Supposedly synthetics leave more deposits when burnt, correct me if im wrong.

 

correct..

 

agreed all i ever use is that


-Shawn (Castrol 20-50..... what would i do with out it)

 

I swear by the stuff, for rotaries and pistons. Hell, I would probably drink it if it wouldnt kill me..

Rat

 

So are you correcting me, or am i right

 

You are right..

 

Cool I know stuff

 

yup good ole castrol is the stuff that rotaries love. and its pretty cheap too. i buy it by the case.

 

Thanx a lot all, it helps

 

Although I also use Castrol 20w50, I would like to point out a few things:

1) Synthetic oil has been used in rotary engines with good results for many years, especially in racing. While synthetic oil is superior, I hardly think that it is worth paying $8/qt x 5qts every 3,000 miles for a regular street-driven car. Some brands of synthetic oil WILL ruin your rotor housings, which is why Mazda recommended against using synthetic oil in general. If in doubt, ask the synthetic oil manufacturer.

2) While heavier oil tends to protect better at high temperatures, it also causes more engine wear at lower temperatures. I think that 10w30 may be a better choice for the weather in Seattle this time of year. See the owner's manual or Factory Service Manual for oil temperature ranges, but note that the 10w40 and 10w50 grades tend to break down quickly, so many people avoid these weights.

 

I agree, should never run anything thicker than 10-30 Castrol.


There is no reason to run the thicker stuff, if you feel the oil wears out to fast, just change it, its only $8 with filter...


Also thicker oil will cause alot more wear on a cold engine start than 10-30...

 

Well, as far as grade goes, I keep with 20-50. But then again, I live in the middle of the desert!!!

Your right though. During the winter months, 10-40 or 10-30 may be a better choice.

Rat