I am going to switch from Castrol 20w50 (running for engine break in) to a synthetic. I was just trying to get anyone's opinion who has been running synthetic on what they feel is currently the best brand for rotarys (Mobil 1, Redline, Royal Purple, etc.) And also what grade for average type climate? (Live in Colorado Springs little hot in summer, little cold in winter) Ain't trying to start up on the whole synthetic thing just asking for quick opinions. Thanks

 

amsoil is probally the best synthetic. But i couldn't wait for it so im doing mobil 1 for now. For breaking in the engine i have herd that it is better to use dino juice.

 

I run Redline 10w30 in my R1 and the climate out here is about 60F in the mornings and 90F in the afternoon.

I lived in Colorado Springs a while ago - although the snow isn't quite as nice as in Tahoe, I do miss the aspens and the Pikes Peak Hill Climb....you're not a native are you?

 

I have never heard of amsoil until reading about it on the forum. Can you find it in the average auto parts store like Pep Boys or Checkers, or is it something you have to order?

 

How did you know I wasn't a native? Been here about 2.5 years in the Air Force,(originally from PA) just got back from 6 months in Pakistan. What a **** hole! Pikes Peak and the mountains are a nice view from here.

 

if you do a search on amsoil.com or whatever there web site is, they will tell you the closest dealer.

 

I have seen dramatic results in oil temps and engine noise from using Redline Racing 40 wt versus regular oil. Amsoil is very good I've heard.

 

Thanks, I'll see if I can find their sight.

 

I just checked there site, and you have to e-mail them and they will mail you back i think. Or at least thats what i had to do. There oil isn't cheep. But it is the best oil out there.

 

I didn't assume anything...although I can only imagine the sacrilegious fun of driving a FD in the snow.

Air Force, huh? Are you in the "cave" or Peterson AFB? I certainly hope they've stopped salting the roads or that you have a second vehicle once November rolls around.

 

I'm at Peterson AFB and they use sand for ice around here. I have an old beater pick up I drive around most of the winter. But still like to drive the FD at least a few times a week for fun on good days. It runs real good in the cold.

 

I use syntec because it IS easy to get and I have good service from it .Garfinkle uses amsoil in the pan and amsoil 2 cycle to the OMP .He will use syntec or amsoil in the turbo charged motorcycle. He uses amsoil in the BMW K1 motorcycle , syntec goes in the grand am

 

I'm not a know it all and dont want to come off sounding that way. But 7's are designed to burn oil. Hence the Oil Metering Pump. Syntectics are not designed with rotarys in mind. In the summer run straight 30W and 5W-30 in cool weather (I know your not driving it in the dead of winter...)

 

I use Mobil 1, 5W-50 grade.

Swear by it, 560+bhp daily driver, I changed from mineral and later another brand of synthetic to Mobil 1.
"from engine building experience"

I am sure there ar others out there that will do the same job, but it's the same old story, when your on a good thing don't change it

 

Mobil1 15w-50 full-synthetic.

4oz of Marvel Mystery Oil in the gas tank.

 

what's the difference in the first number........5 or 15w?