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

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
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	#2
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.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

08-24-2006	#3
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,731	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.