Oil Change - ZR-1 Net Registry Forums

32ValveGuy · 06-29-2020

Hello Guys,

My oil change light came on which begs the question: Do I continue with using conventional oil or switch to synthetic? I have a little over 40k miles on it. If I do switch what is the procedure?

Thanks in advance
Joel

secondchance · 06-29-2020

Quote:

Originally Posted by 32ValveGuy

Hello Guys,

My oil change light came on which begs the question: Do I continue with using conventional oil or switch to synthetic? I have a little over 40k miles on it. If I do switch what is the procedure?

Thanks in advance
Joel

I would switch over to full synthetic. I used Mobil 1 high mileage until about a year ago when I found out Mobil quietly reduced zinc and phosphate from 1100 to 800. Since then, I have been using Amsoil Z-rod 10-30.
Just my opinion and decision.

PhillipsLT5 · 06-29-2020

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

https://www.amazon.com/Mityvac-7201-...-1&tag=mh0b-20

http://www.zr1specialist.com/HAT%20W...ers%202006.htm

Young1 · 07-01-2020

Brad Penn synthetic blend 10/30 is reasonably priced and has a zinc level of 1500. I get it on Amazon. Even mixing with 2-3 quarts that don?t drain from the pan will leave you with plenty of protection. My opinion.

Paul Workman · 07-02-2020

Several quality full synthetic oils out there - just have to be careful of the "ZDDP" (zinc/phosphorus) levels are in/close to the levels present when the LT5 was built (early 90s) (See Marc Haibeck's article/presentation on the virtues of Amsoil he recommends for the LT5.)

I buy Marc's Amsoil by the case. I seldom drive 3000 miles in a season, which means if I change every other year it comes down to the price of a tank of 93 octane. Nothing but the best for our 2 babies! (90/91 ZR-1s)

06-29-2020	#1
32ValveGuy Join Date: May 2019 Location: Prescott, AZ and loving it Posts: 231	Oil Change Hello Guys, My oil change light came on which begs the question: Do I continue with using conventional oil or switch to synthetic? I have a little over 40k miles on it. If I do switch what is the procedure? Thanks in advance Joel

06-29-2020	#3
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,446	Re: Oil Change http://www.zr1specialist.com/HAT%20W...5%20Engine.pdf https://www.amazon.com/Mityvac-7201-...-1&tag=mh0b-20 http://www.zr1specialist.com/HAT%20W...ers%202006.htm Last edited by PhillipsLT5; 06-29-2020 at 09:55 PM.

07-01-2020	#4
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 896	Re: Oil Change Brad Penn synthetic blend 10/30 is reasonably priced and has a zinc level of 1500. I get it on Amazon. Even mixing with 2-3 quarts that don?t drain from the pan will leave you with plenty of protection. My opinion. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

07-02-2020	#5
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: Oil Change Several quality full synthetic oils out there - just have to be careful of the "ZDDP" (zinc/phosphorus) levels are in/close to the levels present when the LT5 was built (early 90s) (See Marc Haibeck's article/presentation on the virtues of Amsoil he recommends for the LT5.) I buy Marc's Amsoil by the case. I seldom drive 3000 miles in a season, which means if I change every other year it comes down to the price of a tank of 93 octane. Nothing but the best for our 2 babies! (90/91 ZR-1s)