help with oil
Team Owner
Joined: Oct 2001
Posts: 46,764
Likes: 5
From: Boynton Beach Florida
St. Jude Donor '07-'12, '20
Made the switch to Royal Purple years ago. 
I think it's great stuff and my shop swears by it. They have a case waiting for me to pick up tomorrow or Tuesday. 
I think it's great stuff and my shop swears by it. They have a case waiting for me to pick up tomorrow or Tuesday.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
lightening of the wallet perhaps? i dont consider mobil to be super oil but i havent seen a UOA that said mobil failed. the only way to tell for sure is to do a UOA of the mobil that is in your car now and then switch, run the car the same amount of miles and then do another UOA. compare the results and go from there. anything other than actual measured data is nonsense.
Pro
Joined: Jun 2011
Posts: 537
Likes: 3
From: Santa Maria California
Personally, I would stick with Mobile 1. That's what the GM engineers recommend for your C5. It is readily available at most retail locations and frequently found on sale. I see no advantage switching to Royal Purple, Amsoil or any other. Mobile 1 is a top tier synthetic lubricant.
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Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
Personally, I would stick with Mobile 1. That's what the GM engineers recommend for your C5. It is readily available at most retail locations and frequently found on sale. I see no advantage switching to Royal Purple, Amsoil or any other. Mobile 1 is a top tier synthetic lubricant.
Tech Contributor
Joined: Jan 2007
Posts: 19,401
Likes: 1,141
From: Dyer, IN
I close friend of mine, said he heard from his brother, who is a GM Mastertech, that going from Mobile 1 to Royal Purple will destroy an LS engine.
Pro
Joined: Jun 2011
Posts: 537
Likes: 3
From: Santa Maria California
Instructor
Joined: Mar 2011
Posts: 228
Likes: 0
From: Richmond, TX
Why would GM spend all the time and money stamping everyone's oil caps if they wanted you to be able to switch oils?
You can't use any different brand in your LS engine. ARE YOU CRAZY?!
You'll seize that **** faster than you can say, "Goddamn, I'm an idiot!".
Drifting
Joined: May 2010
Posts: 1,482
Likes: 2
From: Pearland, TX
The specs in your owner's manual say to use Mobil 1.
Why would GM spend all the time and money stamping everyone's oil caps if they wanted you to be able to switch oils?
You can't use any different brand in your LS engine. ARE YOU CRAZY?!
You'll seize that **** faster than you can say, "Goddamn, I'm an idiot!".
Why would GM spend all the time and money stamping everyone's oil caps if they wanted you to be able to switch oils?
You can't use any different brand in your LS engine. ARE YOU CRAZY?!
You'll seize that **** faster than you can say, "Goddamn, I'm an idiot!".
Le Mans Master
Joined: May 2005
Posts: 6,366
Likes: 249
From: Fort Lauderdale, Florida
Who makes up this garbage? That's absolutely nonsense. I haven't used Mobil 1 in years and I bought my 97,000 mile Z06 new. I've used Royal Purple several times with no ill effects, and in fact use it for all other fluids in my car. For the engine oil I'm currently using Pennzoil Ultra. If its good enough for Ferraris OEM fill, I'm sure it will work for me. And BTW, my car still runs absolutely perfect and uses no oil between changes.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
I heard something smilar from my friend's son who works at Jiffy Lube, they trashed a couple of vette engines by putting in what they use. I think Jiffy Lube uses penzoil? That jiffy lube store will now only put in mobil 1 on vettes.
Last edited by ipuig; Aug 29, 2011 at 03:58 AM.