Castrol 0W30

 

Royal purple, mainly for it's water seperation abilities. It won't mix with water and foam up easily. It just beads up and and is still able to adhear to the metal. Just a little insurance that could save the bottom end if you have water intrusion from blown head gasket etc.

 

I use conventional Castrol GTX 5W-30 and change it every 3,000 miles. No problems!

 

standard GM 5W-30 until warranty is up, then who knows once the 6.0 goes in her

 

mobil 1 synthetic

 

Penzoil 10w30 w/ Fram Tough Guard Filter 104,000+ miles

 

I use royal purple's xpr 5w30 since 500 miles and have changed it every 3000 miles and i use True life oil filter just wash and reuse paid 170 for it but at 60000 miles it's paid it's self off and better than mobile 1 from my experiance.

 

Why do you guys that run synthetic and a decent filter change your oil at 3000 miles? I just feel that is a waste of money.


I run AMSOIL Series 2000 and Mobile 1 5w-30 depending on if I have AMSOIL stocked up or not, and for the filter I run either Mobile 1 or Amsoil Ea02.

I change the oil around 8k-15k, I have oil analysis completed before and it proves to be working.

 

German Castrol 0W-30, initial filter is an AC Delco PF61 from the Trailblazer, then I swap it out for a Purolator Pureone of the same size. I only run this stuff about 5-6K miles as it isn't as tough as M1 Ext performance, the only real Mobil 1. I might switch back to 5W-30 M1 EP when it gets a bit warmer, but the GC stays in while it's cold out. Oh, did I mention my oil pressure seems to be more responsive to engine speed changes with the 0W-30? The OP gauge swings much faster and a bit higher than with 5W.

 

The 0-30 Castrol has the Euro specs, it is much better then the regular Castrol. I just have a hard time finding it around me. But anyway I run Mobil 1 5-w30 and a Delco filter.