what oil grade do you guys use??

I use the 20W50 with the Lucas oil additive. (expensive ****)

 

How much do you pay for Lucas? I know a place where you can get it for like $14 for a litre... not that expensive. I don't use it in my RX tho, as I'm not sure how well it burns. I DO use the fuel treatment tho, with a bit of MMO.

BTW, I only use Castrol GTX 20W50 in the summer. In winter I use Castrol GTX 10W40.
Plus of course I add a litre of MMO in with ever oil change.

 

Castrol GTX 20W50

 

There was a discussion on the FD board about oil weights. Mazda recomends 10W30 in their REW engines. To make a long story short, I am in favor of using 10W30 in my old 13B now.

I currently use Castrol GTX 20W50.

Oh yeah, 10W40 shouldn't be used in a rotary due to the viscosity enhancers which degrade the oil some how.

https://www.rx7club.com/vforums/show...threadid=27708

 

Castrol GTX 20W50

 

Cast. 20-50 year round
sence the rebuild

 

Castrol GTX 20w50 mothafukas....

 

GTX 10W30 w/ MMO

summer only car tho

 

Oh yea I forgot...

I use MMO too

 

Well I'll get in line:

I use Castrol 20W50 also. Year round.

 

Havoline 20/50.

 

so almost everybody runs 20W50, I'm on the right track! I just noticed when I put the 10W30 the oil consumption was greater, and when I'd start the car I'd have a puff of blue smoke.

And yes castrol GTX too!!
maybe valvoline if I can find it.

anybody ever try Agip oil? The brand that usually sponsors ferrari race cars? A place by my house sells that oil, I should check it out.

 

Castrol 20W-50 in the summer and 10w-30 in the winter. 1 quart of MMO every change at 2500 miles.

 

I used to use valvoline in my 7's before and now I use castrol GTX (by the case @ price club) 10w-30 w/mmo in the sump.

All you Moo Foos in Canada using 20w-50... Damn that's thick.
You guys copying the ones in the states w/constant 30degree celcuis weather?

I used to use 5w-30 in the sump in the winter (yes I have no choice to drive it in the winter)

Always worked great for me!

 

Havoline 20W50 year round. I top off with generic 5W-30 gas station oil.

I've heard of people blowing oil cooler lines by running cold engines over 3500 with 20-50, just because it builds so much pressure and the regulators can't bypass it all. Whatever the theory, I'm going to switch to Castrol GTX on my next change, probably 10W40 if I can find it. (Dunno Castrol oil grades.)

Plus I've heardt hat thinner oil is better with huge journal bearings because it flows better. Over 3500 the regulators bypass a lot anyway, so it will still be generating enough pressure, but will flow more VOLUME.

 

I used to use 20w50 in the sumer and 10w30 in the winter till I had my engine rebuilt. Now I use 10w40 Castrol.

 

What about half synthetic oils?? When I was browsing through the sunday paper I think I saw something like that.

 

Castrol GTX 20w50.

the guy at hayes rotary suggested that or 15w40.

 

Hayes Rotary also built my motor that smoked from the very first day I got it. They told me it was supposed to smoke....

 

Good old 20w50, you know the number one choice of top mechanics!.

 

YOU MEAN A GUY THAT CANT GET HIS INTAKE TO ******* SEAL AFTER 2 TRYS....... GLAD I WORK ON MY OWN CAR

 

The only smoke I EVER get out of my car is white / grey "I'm running so ******* rich, I'm gonna make you run for cover cuz yer eyes are gummed up with fuel" smoke, when she's stone cold. I never see any oil smoke, and she only uses about .5 to 1qt every 1000 - 1500 miles. I'm running MMO as premix now too, god does that stink when the car is warming up

--matt

 

I have talked to my engine guy about any type of synthetics and he said that the ydo not burn very well in rotarys and that I would have to change out spark plugs more often because they would get a lot of build up. SO you can run it. The only thing that he did tell me not to run is Castrol Syntechs. He said that it would ruin the engine. I will ask him why this synthetic will ruin an engine while others do not, next time I see him.

 

i've always used Castrol 10W/40 all year round. never had any problems.

 

Having spent a few early years in Oil City Pa., 3rd and 4th grade, I've always been partial to Wolf's Head 10W30...."The finest of the fine since 1879." And of course...MMO!

A different kind of Gone...
Denny, from the 'ol corncrib....