Would 10W 30 Oil Hurt the Engine - ZR-1 Net Registry Forums

JoshV · 08-23-2006

I am about to change the oil my my 94 with 30K miles on it. I have always put the reccomended 5w 30 in but am thinking about using 10w 30 this time. It is a little thicker and it seems like it would give a little better protection. I don't think it would hurt but I thought I would check with anyone who has done it. If there is a reason I shouldn't switch I would like to find out before it is too late.

I would be using mobil 1 with a mobil 1 oil filter. It seems like the mobil 1 filters are as good or better than the GM filters. Thanks

blackjack · 08-23-2006

i was under the impression that gm did recommend 10w30 dor the zr-1...
maybe this has changed with my 93...i use 10w40 amsoil to get that bit extra protection too...i know some people use red line oil,but i have very good results in my motorcycles and my f-350 diesel with amsoil products
if you drive hard at all,go with 10w30,or 10w40....my opinion,anyway
blackjack
91/1735

91King · 08-23-2006

I've been using Mobil 1 10-30 fully synthetic as well as Mobil 1 filters for over three years with no problem.

We Gone · 08-23-2006

Quote:

Originally Posted by 91King

I've been using Mobil 1 10-30 fully synthetic as well as Mobil 1 filters for over three years with no problem.

last 4 years

40th#381 · 08-23-2006

I've been using Mobil 1 10w-30 in my 93 since the first oil change. I've used differant oil filters over the years but use Mobil -1 filters now

Jan

RICHARD TILL · 08-24-2006

castrol 20-50 in my 90-ZR1 and harley too for the last 7 years.

secondchance · 08-24-2006

My understanding of this subject is for cold start (especially in winter) low viscosity for first designation helps with faster distribution of oil. Once at operating temperture, especially in hot weather, higher viscosity for second designation would be preferable.

For this reason, 0-40W currently available for Mobil 1 would be a good choice in cold weather whereas 10-40 would be fine for hot weather use.

Most auto manufacturers typically recomend 5-30W or 10-30W and my personal assumption is, and I may be wrong, the reason they stay away from 5-40W or 15-50W has more to do w/ mpg rating than engine protection issue at high operating temperture.

08-23-2006	#1
JoshV Join Date: Oct 2005 Location: Ohio Posts: 6	Would 10W 30 Oil Hurt the Engine I am about to change the oil my my 94 with 30K miles on it. I have always put the reccomended 5w 30 in but am thinking about using 10w 30 this time. It is a little thicker and it seems like it would give a little better protection. I don't think it would hurt but I thought I would check with anyone who has done it. If there is a reason I shouldn't switch I would like to find out before it is too late. I would be using mobil 1 with a mobil 1 oil filter. It seems like the mobil 1 filters are as good or better than the GM filters. Thanks

08-23-2006	#2
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 512	Re: Would 10W 30 Oil Hurt the Engine i was under the impression that gm did recommend 10w30 dor the zr-1... maybe this has changed with my 93...i use 10w40 amsoil to get that bit extra protection too...i know some people use red line oil,but i have very good results in my motorcycles and my f-350 diesel with amsoil products if you drive hard at all,go with 10w30,or 10w40....my opinion,anyway blackjack 91/1735

08-23-2006	#5
40th#381 Join Date: Jul 2005 Location: Ft.Myers Posts: 62	Re: Would 10W 30 Oil Hurt the Engine I've been using Mobil 1 10w-30 in my 93 since the first oil change. I've used differant oil filters over the years but use Mobil -1 filters now Jan

08-24-2006	#6
RICHARD TILL Join Date: Aug 2005 Location: Iuka, Mississippi 38852 Posts: 756	Re: Would 10W 30 Oil Hurt the Engine castrol 20-50 in my 90-ZR1 and harley too for the last 7 years.

08-24-2006	#7
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,707	Re: Would 10W 30 Oil Hurt the Engine My understanding of this subject is for cold start (especially in winter) low viscosity for first designation helps with faster distribution of oil. Once at operating temperture, especially in hot weather, higher viscosity for second designation would be preferable. For this reason, 0-40W currently available for Mobil 1 would be a good choice in cold weather whereas 10-40 would be fine for hot weather use. Most auto manufacturers typically recomend 5-30W or 10-30W and my personal assumption is, and I may be wrong, the reason they stay away from 5-40W or 15-50W has more to do w/ mpg rating than engine protection issue at high operating temperture.

08-23-2006	#3
91King Join Date: Jul 2005 Location: Colleywood, Texas Posts: 40	Re: Would 10W 30 Oil Hurt the Engine I've been using Mobil 1 10-30 fully synthetic as well as Mobil 1 filters for over three years with no problem. __________________ Craig 91 red/red #1813 EES 402