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Old 06-29-2020   #1
32ValveGuy
 
Join Date: May 2019
Location: Prescott, AZ and loving it
Posts: 229
Default 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
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Old 06-29-2020   #2
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,721
Default Re: Oil Change

Quote:
Originally Posted by 32ValveGuy View Post
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.
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Old 06-29-2020   #3
PhillipsLT5
 
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Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,452
Default 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 08:55 PM.
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Old 07-01-2020   #4
Young1
 
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Join Date: Sep 2016
Location: Ocala, FL
Posts: 894
Default 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.
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Old 07-02-2020   #5
Paul Workman
 
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Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
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Default 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)
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