Oil Change Time ... Which and Why >>

[ScottB]

http://www.autogeekonline.net/gallery/data/500/medium/00214.JPG

Obviously a bit of a difference in price (Amsoil) and theres more in one (Mobil 1) versus the other container. Your thoughts and why ??? Both meet DEXOS requirements and also meet GM's new requirements.

[Sommy]

Mobil 1. Its good enough for Mercedes to use.

[Meticulous-Detail]

I think they are both great, so price would be the deciding factor. I have castrol edge in the 5.4, amsoil ATF in tranny and royal purple in the rear end.

[DaveT435]

Mobil One is used by GM.

[Porsche Pilot]

Porsche specs Mobil 1. I thought I would be cheap one time and used another brand. Car ran too hot. Mobil 1 for me all the way. There is a reason car makers spec certain brands and viscosity. They know a lot more than me!


Sent via telepathy.

[BobbyG]

Hey Scott,

Amsoil, Mobil 1, Royal Purple are all great 100% synthetic and will provide the very best in lubrication and protection. I've used all three and see no difference in performance, oil consumption, or fuel economy in my 2004 Z06 Corvette, my 1999 Dodge Dakota, or my 2003 Toyota Camry...

Z06 Corvette

When I changed the fluids in my Z06 I went with Royal Purple and use it to this day. I did discover that the 6 speed shifts smoother and more consistent using Royal Purple over stock GM lubes.

Dodge Dakota SLT 4X4

My Dakota uses Mobil 1 in the motor and Amsoil full synthetic in the automatic transmission, front and rear differential.

Toyota Camry XLE

The Camry uses Mobil 1 in both the engine and transmission...

[DaveT435]

I have a guy that used to work for me that is now a mechanic. I was considering Royal Purple. If I remember correctly the Royal Purple didn't have the same ratings. I wish I could remember...but he showed me on the bottle. He told me it was an older generation oil. That was about 18 months ago so things may have changed...

[mbc4934]

Out of the two I would go Mobil 1. Ran in my Nissan Titan back in the day and was always pleased.

[MinnBobber]

Mobil 1.
Mercedes does a huge amount of testing of all their fluids (oil, power steering, brakes, tranny,etc) and their engines come with Mobil1 and Mobil1 recommended.

IMO, it is clearly the best out there.

[HotRodJoe]

I run Mobil 1 in modern gasline cars, sometimes my Diesel truck, and Brad Penn in my old motors.

[ScottB]

I have a guy that used to work for me that is now a mechanic. I was considering Royal Purple. If I remember correctly the Royal Purple didn't have the same ratings. I wish I could remember...but he showed me on the bottle. He told me it was an older generation oil. That was about 18 months ago so things may have changed...

I am running Royal Purple currently but the price increase was crazy (I need to do 4 cars this weekend) so I jumped at some Amsoil at cost. I remember RP offered it was DEXOS compliant but would not pay the costs associated with testing/using the certification in addition to GM's new stress testing of oil. It appears on the newer bottles it has changed those views.

[Bigbull2984]

Amsoil, reason my even the Acura dealer was surprised how well my car ran with 171k miles..(not saying Mobil1 wouldn't do that)

In my new Ac Ive been using the Amsoil XL. Try the SSO 0w30 instead of 5W30.

[Bigbull2984]

I am running Royal Purple currently but the price increase was crazy (I need to do 4 cars this weekend) so I jumped at some Amsoil at cost. I remember RP offered it was DEXOS compliant but would not pay the costs associated with testing/using the certification in addition to GM's new stress testing of oil. It appears on the newer bottles it has changed those views.

I have seen alot of UOA showing RP starts to shear alot.

[chris.ganucheau]

Amsoil is the better oil but you will have no problem with mobil 1. I run mobil 1 in my car but there isn't anyone around where i live that sells amsoil.

[Waxy]

Use what the manufacture reccomends, Corvette Mobil 1.