What Brand Oil Do You Use?

[edward9027]

Just curious, my dealer is using Pennsoil, personally I lean toward Castrol, ed

[Matt_]

Royal Purple. Might start using Amsoil though

[2007VictoryRed]

Amsoil, With k and n Oil filter

[georgecdisc]

Mobil 1 5W-30, Mobil 1 Filter. Would also use Amsoil synthetic as an alternative oil, Wix/Napa Gold as alternative filter. Running Mobil 1 because I got 6 quarts for $30 from a posting on craigslist. Old truck I used Castrol GTX High Mileage, didn't want to put in extra bucks for a vehicle I may not have very much longer.

[Norman]

Amsoil 5W-30 with Amsoil oil and air filter. Truck is smoooth. After an oil change, almost a little too smooth, like the power ain't there. Once the oil gets good and ready after a little use, she likes to GO.

[Bowtie2Sierra]

Castrol 5w30 and am switching to Mobil 1 at the next change.

[Silverado4x4]

Castrol 5w30

[ocean4200]

Read this post for more answers http://www.gm-trucks.com/forums/index.php?...mp;#entry855222

 

I will use Mobil1 5W30 in my futur truck. I already bought 2x 4.4L of oil at Canadian Tires In Canada. It was 30$ after rebate so a good price for a synthetic oil

[Tsmith]

Mobil 1 5W30 and Mobil 1 oil filter.

[nh09z71]

Just changed to Mobil1 5-30 @1000 miles with Mobil1 filter too.

 

Also just picked up another M1 filter and some more oil at Advance Auto....they have a great deal going on now.....5 qts and filter for $29.95

 

I've got 2000 miles on the Mobil1 now, and my DIC shows 80% oil life remaining. May try the Mobil1 extended performance oil sometime as well.

[vortec350]

I am an Amsoil dealerand ONLY run Amsoil fluids and filter

[MADS99]

Valvoline MaxLife 5-30,with A/C Delco Filter.

[shocktrp]

Mobil1 oil & filter (5w30).

[Matt_]

do we have a website "local" Amsoil dealer??

[Blake]

Mobil 1 synthetic and AC Delco oil filter.