) and really liked it. Anyone using it in their vette?
Works well for me, no problems. 
same here
Royal purple???
Instructor
Joined: Jul 2006
Posts: 154
Likes: 0
From: El Paso TEXAS
St. Jude Donor '06-'07
rp
all you have to do is look on the search to see that RP, Amsoil, and Mobil 1 are top rated. are you looking to RP your engine or your tranny? I use Mobil 1 on engine, RP soon in my six speed. Should do real fine.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I have done a lot of reading over on bobistheoilguy.com and RP really hasn't shown very good results. The German Castrol has actually shown the best wear numbers and its available at Autozone for the same price as other synthetics. I now run this in all my cars.
Instructor
Joined: Sep 2005
Posts: 222
Likes: 1
From: Brenham Texas
Royal Purple
I am running it in my 99.
Oil and rear end so far.
Will be doing the transmission in the spring.
The car seems to run strong with it and has elimated some nosie
I was getting from the rear end.
Sold me.
And it has been proven by dyno test you gain 9 to 10 hp from doing the motor, trans and rear end.
Oil and rear end so far.
Will be doing the transmission in the spring.
The car seems to run strong with it and has elimated some nosie
I was getting from the rear end.
Sold me.
And it has been proven by dyno test you gain 9 to 10 hp from doing the motor, trans and rear end.
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Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
I use it in oil, tranny and rear in my vette, I have been using this in all the cars ive had for more than 3 yrs now, ill never use anything else. Oh and I still change it every 3k even though they say its good up to 10-12k miles
Drifting
Joined: Jan 2007
Posts: 1,565
Likes: 6
From: Henderson NV
Just got a 98 C5 6 speed with 44k miles. 90% oil life left but I want to change the oil and filter to get it on my schedule soon. Spec rqmts. are 5w-30 Mobil 1 so I'd use the same weight Royal Purple engine oil, but what about the 6 speed and rear end? What weight RP would they use? Oh, and what oil filter do you guys use with RP? This will be my first venture into synthetic oils.
Thanks for helping a C5 newbie, a very happy one too.
Mick
Thanks for helping a C5 newbie, a very happy one too.
Mick
Last edited by Mach2; Jan 31, 2007 at 03:45 PM.
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
The 6 speed manual tranny uses Dexron III ATF... tha tis not a mistake, that is the spec.
The rear diff uses 75W90 synthetic gear oil + 4 oz of GM limited slip additive ( or aftermarket equiv.)
any good quality engine oil filter is fine
AC/Delco
Mobil 1
Napa Gold
Wix
K&N
The rear diff uses 75W90 synthetic gear oil + 4 oz of GM limited slip additive ( or aftermarket equiv.)
any good quality engine oil filter is fine
AC/Delco
Mobil 1
Napa Gold
Wix
K&N
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Just got a 98 C5 6 speed with 44k miles. 90% oil life left but I want to change the oil and filter to get it on my schedule soon. Spec rqmts. are 5w-30 Mobil 1 so I'd use the same weight Royal Purple engine oil, but what about the 6 speed and rear end? What weight RP would they use? Oh, and what oil filter do you guys use with RP? This will be my first venture into synthetic oils.
Thanks for helping a C5 newbie, a very happy one too.
Mick
Thanks for helping a C5 newbie, a very happy one too.
Mick
Synchromax-Tranny
Max-Gear 75W90 differential (has additive included)
CF Member
Joined: Apr 2005
Posts: 109
Likes: 0
From: San Ramon CA
Melting Slicks
Joined: Nov 2004
Posts: 2,592
Likes: 393
St. Jude Donor 05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Intermediate
Joined: Nov 2006
Posts: 33
Likes: 0
From: Perry Hall Maryland