ZR-1 Net Registry Forums - View Single Post - What kind of oil consumption are you experiencing?

Paul Workman · 10-22-2017

I "voted" for 1qt/1000 miles, give or take, which includes both normal traffic hwy flow, and some spirited (3000 to 6000+rpm) driving. AT issue, as Steve points out, it seems the usage is greatest as level is at the FULL line on the dipstick. That is to say, that first 1/2 quart goes away way faster than the last half (to the FILL line). Bottom line: IT VARIES..

1990 5.7L
almost 69k miles
AMO 10W-40 (full synthetic w/ ZDDP concentrations appropriate for the LT5)
Stock bottom end
Ported except for the TB
SW headers, 3" exhaust except for MF mufflers.

10-22-2017	#7
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: What kind of oil consumption are u experiencing? I "voted" for 1qt/1000 miles, give or take, which includes both normal traffic hwy flow, and some spirited (3000 to 6000+rpm) driving. AT issue, as Steve points out, it seems the usage is greatest as level is at the FULL line on the dipstick. That is to say, that first 1/2 quart goes away way faster than the last half (to the FILL line). Bottom line: IT VARIES.. 1990 5.7L almost 69k miles AMO 10W-40 (full synthetic w/ ZDDP concentrations appropriate for the LT5) Stock bottom end Ported except for the TB SW headers, 3" exhaust except for MF mufflers.