1990 ZR-1
 

19,000 CAN I USE MOBILE ONE. NO LEAKS RUNS GREAT. THANKS

Re: 1990 ZR-1
 

That's the factory fill, but Mobil has drpped the ZDP in the oil. Most like Royal Purple or AMS Oil with the higher ZDDP.

Re: 1990 ZR-1
 

The majority use Mobil 1.

Use Mobil 1 High Mileage for higher zinc content.

Re: 1990 ZR-1
 

THANKS FOR THE INFO. JOE

Re: 1990 ZR-1
 

That's not exactly true, you can get M1 with higher ZDDP, try 0w40 euro formula.

Re: 1990 ZR-1
 

GREAT INFO . JOE

Re: 1990 ZR-1
 

joe,
we're glad to have you aboard and hope you learn and contribute freely...however, caps lock is shouting at us and hard to read.

Re: 1990 ZR-1
 

[QUOTE=Kevin;98610]joe,
we're glad to have you aboard and hope you learn and contribute freely...however, caps lock is shouting at us and hard to read.[/QUOT ok doug. joe

Re: 1990 ZR-1
 

Interesting read here :

http://www.zr1specialist.com/HAT%20W...5%20Engine.pdf

Re: 1990 ZR-1
 

thanks alot for the info i made copies of that test sheet. very interesting. joe

Re: 1990 ZR-1
 

With the M1 0w40, you have to make sure its the euro formula, I usually get it when it's on sale for $4.99 at Autozone or Advance Auto Parts. It's usually almost $7.00. I just stock up on the stuff when it's on sale.

Re: 1990 ZR-1
 

Here is a link to hi (Marc Haibeck's) site. There is ton's of info there.

http://www.zr1specialist.com/

Rhipster has alot of great info stored on this (LT5 Registry) site also.

Re: 1990 ZR-1
 

AMSOIL Product's are top of the line and I have been using them since the early 70's. I have put them to the extreme test's in both hot and cold climates and yes it is a once a year oil change for most drivers.:flag2: