I just changed to Mobil1 15w/50 this week. First of all I notice the turbo's are quick to spool up. Little less lag.
Good for my street-ported engine.

However with the thick weight behind it... the secondary turbo does not come in as hard. I always break the tires loose when the second turbo comes on line with the thinner oil.

I have seen many Japanese tuners using as thick as 20w70. WHY? And their temps are close to mine here in Canada. apox.-10 to about 30 degrees. "Weird"?

I Can't believe I held off synthetic for this long. But I think I might change to 10w40 Mobil 1.

What weights do you synthetic users use?

 

Just wanted to add...

Now my Oil presure gauge actually works.... I get 3/4 high oil presure til the car is warm then at idle it settles to about 1/4 way up.

Instead of half way or nothing sometimes at idle.

Nice feeling--- when you never see that gauge drop to "0"
anymore... cheers...

 

i used 20w50 royal purple when i ran synthetic

 

10W-30 Mobil 1

 

Hi jmo87...

How come you don't use the Royal Purple anymore?

jc.

 

10W30 Mobil One.

 

Has anyone used Exxon superflow synthetic I noticed its about $3 a quart vs $4+ for other brands.

 

I was told by a auto engineer when using synthetics to use the thinest weight acceptable. I use 10w-30 Amsoil. The synthetics protect and hold up better than petroleum heavy weight oils. People confuse oil pressure with oil flow. 10-30 gives better flow which requires less pressure. Has anyone read the motor oil bible?