thafox

i've heard that synthetic isnt that bad an read somewhere that racing beat uses royal purple in there engine's ....i was thinkin bout royal purple but cant find it in the parts stores....so other than sectachrome recomending castrol gtx non synthetic what else would be a good one?

ColinRX7

Me and alot of local 7 owners use Castrol GTX 20w50.. Only one or two that were running premix still used GTX 20w50..

Nan da yo!

I use royal purple. Its a bit expensive (like 6 or 7 bucks a quart) but I noticed a bit smoother revs and I'm sure it helps out with the longevity in the engine. A lot of guys that I've talked to said that they used the stuff, so I hopped on the expensive boat.



I heard somewhere that Mazda said not to use synthetic because back in the day (i.e. 70s and 80s) synth oil was **** and wouldn't combust in the chambers, but now supposedly its supposed to be better. I dunno about that too much, so I just stick with the bling bling synth oil.

thafox

wha stores can i find royal purple any way other than online

Seraphx7

Synthetic is good without cats. I was using it and when i changed the oil i did feel a power increase. honestly.

Nan da yo!

Napa carries it out here for us. There's also a store called PAW (Performance Auto Warehouse?). Its mainly a muscle car store, but I only need oil from there. That's where I get my goods.

rx7_re

I have been curious as to why it seems like everyone runs 20w50? Is it just me or am I the only one who doesn't run it?

boxrs4sale

i run royal pink

-=RX-7 KID=-

i run GTX 10W40 and premix with TC-W3 2 cycle for water cooled engines.

Nan da yo!

Cuz the manual says to run it at the temp. that I live in. Winter time I run 10-30 since its colder and I don't really need the thicker oil for better cooling properties. That and thicker oil= better protection.