ZR-1 Net Registry Forums - View Single Post

USAZR1 · 02-27-2014

GM also recommended 5W-30 and my 90 would burn a quart of that every 600 miles. Switching to 10W-40 reduced consumption to about one quart every 1,200 miles and also quieted down the CTT rattle considerably.

02-27-2014	#98
USAZR1 Join Date: Oct 2013 Location: Wichita Falls,Tx Posts: 594	Re: Which oil do you use GM also recommended 5W-30 and my 90 would burn a quart of that every 600 miles. Switching to 10W-40 reduced consumption to about one quart every 1,200 miles and also quieted down the CTT rattle considerably.