^^ thats great^^

thanks a lot man

 

yes i have a '07 and calls for 5w-20 or 0w-20 ....but finding royal purple in 5w-20 is tough! would 5w-30 hurt it?? please tell me if i should just use 5w-20?

 

It will be fine.
Or, try Amsoil's new 5w20 100% synth!
That's what I was going to use before I went RP.

https://www.amsoil.com/storefront/asm.aspx

Scott

 

That's what I've used since my tC was new. SoCal, south Florida, not much diff there, you'll be fine with it, just like I am. Haven't used anything else in any of my cars since Syntec first hit the market (seem to recall was early '90s), great stuff!

 

Syntec and 0w30 are different beasts.
0w30 ONLY comes from Germany, and is labeled as such.
Are you using that?
Doesn't matter, just want people to know what's what here.

 

It is not true that a 0w30 will be too thin. All multigrade motor oils act like all other fluids, they are still thicker when it gets cold and thinner when it gets warm. The only difference is that multi-grade oils don't see as much change in their viscosity (how thick/thin they are) than a stright single weight oil (ie SAE 30).

My lame attempt to make charts below isn't exaclty correct but it works to make my point. Also remember the higher the viscosity number the thicker the fluid is, and vice versa.

SAE 30
At 0 degrees viscosity is 200
At 100 degrees viscosity is 100
At 200 degrees viscosity is 10

SAE 10W30
At 0 degrees viscosity is 175
At 100 dgrees viscosity is 75
At 200 degrees viscosity is 10

SAE 0W30
At 0 degrees viscosity is 140
At 100 degrees viscosity is 60
At 200 dgrees viscosity is 10

As you can see at 200 degrees (running temp) all oils thin down to the same viscosity, but a 0W30 won't thicken up as much as the other two when it gets cold.

Now the GC is a borderline 0W30 weight oil. It's almost a 0W40. So you should take that into consideration. I like to run Motul 300V, but next oil change I think I'll go with Motul E-Tech Lite, which is a borderline 0W30, but in the other direction. Almost a 0W20.

Here are some links to help you.

http://www.upmpg.com/tech_articles/m...ity/index.html
http://www.castrol.com/liveassets/bp...syntec_usa.pdf

 

That is true, GC 0w30 is a "thick" oil.
Worked well in my tC, just too hard to find...