Opinions on oil - ZR-1 Net Registry Forums

jrd1990zr1 · 02-19-2007

1990 ZR1, 6400 miles. Has a non original oil filter on it so the oil has been changed at least once. Not sure what type oil is now in it.

What is the best oil to use for an oil change? Filter?

Thanks for the opinions, John

1990 quasar blue · 02-19-2007

Mobil 1 10w30 and a Bosch filter. 3401 if I remember right.

bobbyhi · 02-19-2007

Quote:

Originally Posted by 1990 quasar blue

Mobil 1 10w30 and a Bosch filter. 3401 if I remember right.

That's what I use. No problems!!!

jrd1990zr1 · 02-20-2007

I am not sure if the oil currently in the car is a synthetic. Is there a problem with any residual oil in the engine mixing with the Mobil 1?

Thanks guys for the advice.

Hammer · 02-20-2007

Mobil 1 and Bosch filter here too.

Z Factor · 02-21-2007

Quote:

Originally Posted by jrd1990zr1

I am not sure if the oil currently in the car is a synthetic. Is there a problem with any residual oil in the engine mixing with the Mobil 1?

Thanks guys for the advice.

There is a good chance the previous owner used a synthetic as most people who own low mileage ZR-1's do not skimp on maintenance. There will be some old oil in the system since you can not get it all to drain. However if you want to be sure there is no regular oil then drain it over night, replace with synthetic then change it again within a short period of time. As to the most common oil used, Mobil 1 is at the top. Here is a poll on the filters forum members are using.

http://zr1netregistry.com/forum/show...6&page=1&pp=40

tomtom72 · 02-22-2007

Quote:

Originally Posted by jrd1990zr1

I am not sure if the oil currently in the car is a synthetic. Is there a problem with any residual oil in the engine mixing with the Mobil 1?

Thanks guys for the advice.

JRD, I had the same Q when I got mine as the orig owner didn't believe in syn oil for the car. I just changed the oil & filter and let it go for the usual 3K miles/3mos and changed it again. I had no strange noises nor did anything negative occur. 14K miles later everything is still okay!

Tom

blackjack · 02-22-2007

most synt. oil are compatible with mineral oil...you cant remove all the oil in your engine with an oil change,so my amsoil rep said you run full synthetic only on the second oil change...makes sense...
blackjack

jrd1990zr1 · 02-24-2007

Thanks to all for the advice.

02-19-2007	#1
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 925	Opinions on oil 1990 ZR1, 6400 miles. Has a non original oil filter on it so the oil has been changed at least once. Not sure what type oil is now in it. What is the best oil to use for an oil change? Filter? Thanks for the opinions, John __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)

02-19-2007	#2
1990 quasar blue Join Date: Feb 2004 Location: Ma Posts: 403	Re: Opinions on oil Mobil 1 10w30 and a Bosch filter. 3401 if I remember right.

02-20-2007	#4
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 925	Re: Opinions on oil I am not sure if the oil currently in the car is a synthetic. Is there a problem with any residual oil in the engine mixing with the Mobil 1? Thanks guys for the advice. __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)

02-20-2007	#5
Hammer Join Date: Apr 2006 Location: Ideho Posts: 2,647	Re: Opinions on oil Mobil 1 and Bosch filter here too.

02-22-2007	#8
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 510	Re: Opinions on oil most synt. oil are compatible with mineral oil...you cant remove all the oil in your engine with an oil change,so my amsoil rep said you run full synthetic only on the second oil change...makes sense... blackjack

02-24-2007	#9
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 925	Re: Opinions on oil Thanks to all for the advice. __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)