Maybe so. I did not ask them why. I just figured they knew best. I think that eventhough everything in my engine is new that the old design was not made for a slippery synthetic. Meaning if there is a leak path then it will find it.I don't think it is a myth that synthetic oil can make a engine leak. I have seen it. I will ask them and let you guys know.quote:
Originally posted by GSV:
Did you ask them why? Sometimes their reasons are just plain ridiculous.
I had a guy at NAPA tell me Synthetics leave the engine parts bone dry at startup where conventional oil clings to the metal.
mazda used to recomend this because the synthetics didn't burn off as well as the dino (kind of a direct injection thing).quote:
Originally posted by uconn1150:
For whatever reason (and maybe someone like Molekue may know) but Mazda forbids use of synthetics in their rotaries...
I've heard this a few times but don't get it. The only 2 cycle lubricants that do burn cleanly are synthetic...quote:
Originally posted by tweeker43:
mazda used to recomend this because the synthetics didn't burn off as well as the dino (kind of a direct injection thing).quote:
Originally posted by uconn1150:
For whatever reason (and maybe someone like Molekue may know) but Mazda forbids use of synthetics in their rotaries...
I've run synthetics early on and had no ill effects. Run dino for 100 miles as a "flush" after the rebuild, then fill with synthetic and drive like normal. It's always worked for me...quote:
Originally posted by sbc350gearhead:
Most engine builders will tell you not to break the engine in on synthetics. But I have never seen an engine (in good condition), leak with synthetics, that did not leak with a conventional. I have run synthetics on rebuilt (improved) engines for years and have never had a problem after a break-in with a conventional oil.
The rotary engine is different. Oil is in the combustion chambers at all times, therefore burns off slowly. Synthetics are more resistance to burning (in motor oil form, not 2 cycle), so they thicken more and more. Or so I've been told.quote:
Originally posted by jsharp:
I've heard this a few times but don't get it. The only 2 cycle lubricants that do burn cleanly are synthetic...quote:
Originally posted by tweeker43:
mazda used to recomend this because the synthetics didn't burn off as well as the dino (kind of a direct injection thing).quote:
Originally posted by uconn1150:
For whatever reason (and maybe someone like Molekue may know) but Mazda forbids use of synthetics in their rotaries...