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08-07-2007, 08:25 PM
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#1 |
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Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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oil consumption question
i have noticed since i have put in my 350 40000 miles ago that it has consumed about a quart plus between every oil change. everything on the motor was new from carb to oil pan. the truck runs extremely strong and the plugs are in great condition. what could cause this? there are no symtoms such as any kind of smoke at all. could it be crank case blow by?
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
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08-07-2007, 08:34 PM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: oil consumption question
If you're replacing the oil at regular intervals such as 2500 to 3000 miles, that's not bad. A lot of mechanics will tell you that's about normal.
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08-07-2007, 08:34 PM
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#3 |
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Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,861
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Re: oil consumption question
Sounds normal to me. My "re-built" 350 goes through a quart every 700-900 miles with very clean plugs and no smoke (and only very minimal leaking I should add).
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent. |
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08-07-2007, 08:41 PM
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#4 |
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It's the air up here
Join Date: Mar 2007
Location: Western Colorado
Posts: 710
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Re: oil consumption question
How much oil did it use before 40k?
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1971 cheyenne k10 4 speed np 205 454 BB factory a/c  Never drink down stream of the herd! Eric |
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08-07-2007, 09:25 PM
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#5 |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: oil consumption question
How much oil did it use before 40k?
I understood him to mean that it's been doing it since he installed the engine 40k miles ago.. |
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08-07-2007, 10:39 PM
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#6 |
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Dave's not here, man
Join Date: Jun 2004
Location: Winder, Georgia
Posts: 2,000
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Re: oil consumption question
When I worked at the GM dealer we were told that 1 quart per 1,000 miles in normal. According to that you're above spec.
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- 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 |
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08-07-2007, 10:45 PM
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#7 |
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Registered User
Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: oil consumption question
Pcv Valve Working Good And Sealed Good. Engine Needs Vacume In Bottom End To Seal It Good. If No Pcv Valve Got A Good Breather On Crankcase ?
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I BELIEVE IN JOHN 3:16 |
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08-07-2007, 10:46 PM
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#8 |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: oil consumption question
thats not unheard of but i know since i replaced my valve stem seals i havnt lost any oil inbetween oil changes, however i dont have a milage number to give you
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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08-08-2007, 12:07 PM
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#9 |
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Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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Re: oil consumption question
yea. the engine has been doing it since new. thanks for the input guys. ill just keep an eye out for the oil level.
__________________
1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
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