I will stand informed then. I will still check with a manufacturer that they will guarantee it's use. Would like to see a street motor after miles of use.

My only other issue with it is it's ability to find a place to leak, when put into application that had been using petroleum. Has that been addressed?

Thanks.

I'm not sure. I know a lot of guys have been running synthetics without problems. A lot of the big shops like pineapple recommend synthetics. The only issue I know of is it slows the break in process due to reduced friction. It's been suggested to break in on regular oil and then switch to synthetic.

I've been running synthetic now for a year or so, (switched, no leaks) but I'm not convinced the cost is worth the benefits. It might be better to run standard oil and just change it twice as often. The upside to synthetics is reduced friction, lower operating temps, and doesn't break down as easily. It also doesn't coke up on turbo bearings as easily which can be a problem on oil only cooled turbos..Most guys running synthetic are running lighter oils (5/40, 10/40) which could be why some experience leaks? I'm running 15/50 and have no problems with it.

The older oils had high amounts phosphorous (bad for o2 sensors and cats) and a high ash content, (higher carbon buildup)

All synthetics that I know of now have to at least meet the API "SJ" rating, which specifies low content for both phosphorous and ash.

I would be more concerned in finding an oil that has not fallen prey to the reduction of zinc dithiophosphate or ZDDP which is a friction reducing additive. The new "environmentally friendly oils" have reduced this additive because it's shown to reduce the effectiveness of catalytic converters over time. By reducing the additive, engines wear out faster, especially engines under more stress. (high performance engines)

I point that out (ZDDP) on the my forum. Couple of good links there that I found.
I agree with the concern of the new EPA safe oils. Which could push me totally into the synthetic camp. And yes good point about turbo coking. I have not seen that as much in my FD client cars since the oil is not in there more than 1500 miles. Most change at 1200.

The main problem with leaking came from using in applications, motor, trans or rear that had been using petroleum for a long time. Do not really see it as much with new builds where, yes break in is done with petroleum then switch to synthetic.

Well good news, After my mix up and putting in over 1/2 quart in a tank, I ran it down to 1/2 tank and topped it off. It is running great and is not smoking or leaking at all! It runs much smoother and seems pepped up a bit over stock omp.

Idemitsu claims that thier oil is intended for the rotary. I am assuming that they are referring to the metering system. Right now my OMP is blocked off from the sump and injecting 2-stroke Idemitsu. So far so good. We'll see. I'm running 10w30 and my turbo's are now leaking EVER so slightly...... damnit.


Why thank you.... I have spent 2.5 yrs planning this thing out and building it :rofl:

Not to flame, and I did go to your homepage, but why that comment about the FC?

I will be posting my reasons there soon. And there is no offence intended to all of those of you that love them.