What weight oil are you guys using and why??? Big block- Small block, Warm weather- Cold weather....I know there is a great post about the make up of different oils but there seems to be much debate about the heavier oil vs. thinner oil. Whatcha running :confused: :confused: :confused:

20W50 Castrol in my 468 all year 'round. 40psi at hot idle.


Chris

15-40 rotella in the 'velle & 5-30 Mobil 1 in the daily drivers

Mobil 1 10W30 in the Chevelle year round.

Valvoline VR-1 20W-50 Racing oil. I have been using this product for 25 years. Tha good stuff! :thumbsup:

Mobil 1 10W30 in the Chevelle year round.

Ditto. 40psi at hot idle.
mike

15-40 rotella in the Monte with a BBC. I use it due to the zinc content.

I sent you an email with some oil info,check it out.

Scott

Valvoline 20 50, 40 psi warm idle in 350 SBC

Kendal 20w50 in the summer (nitrous big block)

Keep em coming....

20W50 Valvoline year around

10w30 in the truck
10w30 in the Chevelle
5w30 in the Tahoe
10w40 in the mustang

10W30,summer driver only
Guy

10W30 Valvoline SynPower full synthetic year 'round (ZZ502). A good quality oil and a little cheaper than Mobil 1.

20/50 all the time

Valvoline 5w-30 in Chevelle and S-10 year around.

Mobil 1 syn 5w-30 in GMC Sierra.

valvoline 10w-40 year round in 383 small block .

15-40 rotella in my 388 stroker, again becuase of the zinc content.

Amsoil in everything.
20W50 Racing - Chevelle
5W20, 5W30 and 10W30 depending on what is recomended in the other vehicles.

10W-40 in my 468...summer driver only

Valvoline 20W50 racing oil. I've used it for years in my Chevelle.

Mobile 1 SUV 10w-40 in the Chevelle 468
Bill

I put in WHAT THE MANUFACTURER RECOMMENDS.

I put in WHAT THE MANUFACTURER RECOMMENDS.

So what does the manufacturer recommend for a 30 over 454, full roller w/ 10.25-1 compression :confused: :confused: :confused:
I'm sorry but I can't find the manufacturer recommendation sticker anywhere :clonk: :clonk: :clonk:

So what does the manufacturer recommend for a 30 over 454, full roller w/ 10.25-1 compression :confused: :confused: :confused:

I think straight tap water should do fine...............:D

try it & tell us how it does:cool:

I think straight tap water should do fine...............:D

try it & tell us how it does:cool:

I wouldn't use anything but Pure Distilled Water from France...:D

15-40 rotella in the Monte with a BBC. I use it due to the zinc content.

The new improved rotella is all new since October and the zinc has been cut. It is to meet the new smog requirements for the 2007 diesels.
Shell still markets the old foruma but most stores are now only selling the newer version. It has a yellow stick on the front.
The old version is still available from a oil supply house. I bought up 80 quarts of the stuff last week to guarantee a 5 year supply.
All my other daily drivers get 10-30 and anything that is on sale.

15-40 rotella in my 388 stroker, again becuase of the zinc content.

that zinc dissapeared in October, the new stuff meets the new smog requirements for diesels.

this is a link to more information on the new oil
http://forums.corvetteforum.com/showthread.php?t=1597322&highlight=rotella+oil

"that zinc dissapeared in October, the new stuff meets the new smog requirements for diesels."


Your mistaken,the zinc levels were lowered & not removed,see below for the info i go staight from the sheel oil eng's when i asked them if there was enough zinc left in the soteela t to protect our flat tappet cams.

11/18/06 UPDATE ON THE NEW REFORMULATED SHELL ROTELLA T 15W-40/DIESEL OIL FOR 2007 FROM SHELL OIL ENGINEER

Here is the ans i got from shell oil engineer when i asked if the newly reformulated rotella t 15w-40 still had enough anti wear ZDDP/Zinc in it to safely/properly protect the flat tappet hyd/solid lifter cams in our older SBC/BBC motors.
Dear Scott,

Zinc levels are being lowered on almost all engine oils, but the heavy duty diesel engine oils, such as the Rotella T, will continue to have higher levels than the passenger car/gasoline engine oils. The Rotella T 15W-40 meets API SL, SJ, SH and all previous specifications for gasoline engines. Rotella T 15W-40 is recommended for and used in many mixed fleet applications. It does have a higher antiwear level to protect the heavy duty diesel engines and should give you very good performance in this regard.

Thank you for your interest in our products! If you have any further questions, please call us at 800 231 6950.

Sincerely,
MaryCarol Boemmel
Lubrication Engineer

The new Rotella oils are designated CJ-4 which is a reduced level of zinc. The old designed oil with the high level of zinc is still available but not easy to find at any discount store. You need to go back to a supplier.
While the new rotella oils are still better then the average motor oil I have a very very expensive engine and took the effort to find the old rotella oil before the zinc was reduced.
I do run a roller cam with 550 pound springs. I lost a roller cam last year before I made the switch to rotella.
http://i11.tinypic.com/2hn5rev.jpg

Scott, That's great news...Thanks. I was getting a little worried because I have a couple gallons sitting next to the Chevelle, ready to go in this weekend. Did you get a chance to look at the pm I sent you? Thanks again..:thumbsup:

This is pretty good article. Looks to me like the Valvoline Race is the way to go. I was surprised to see the zinc content of Shell Rotella 15-40.

http://www.atis.net/oil_faq.html