The oil is not even 3,000 miles - Page 4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**smitty62** · 01-03-2008, 06:45 AM

"Royal Purple is synthetic racing oil...supposed to get ya 10 hp"

Don't forget one of those magnetic fuel line thingies from JC Whitney..that should be worth 20 hp easy!!

**WorkinLonghorn** · 01-03-2008, 10:36 AM

I had a SBC "rebuilt" and it continued to burn lots of oil (qt./500 miles)for 20,000 miles and during this time the oil got black pretty quickly.
Then suddemly it stopped burning/turning black.A quart would last past 1000 miles and didn't darken so much.So I switched to synthetic (Mobil-1).

It is my belief that the "builder" didn't prep the cylinders correctly,or mismatched the rings to the job and break-in was delayed.
This could be happening here too.
What is your oil consumption rate?

*Billla* · 01-03-2008, 11:02 AM

Quote:

Originally Posted by WorkinLonghorn

So I switched to synthetic (Mobil-1).

It is my belief that the "builder" didn't prep the cylinders correctly,or mismatched the rings to the job and break-in was delayed.

Note that Moble 1 definitely does not have enough ZDDP for a flat-tappet cam.

That's a big leap from some black oil that hasn't been changed recently

**WorkinLonghorn** · 01-03-2008, 11:26 AM

Noted.
OP seemed to think his oil got black quickly and I noticed the same thing in a motor that wouldn't break-in.Sorry if that seems like a "leap".

**special-K** · 01-03-2008, 11:50 AM

...time!!...again

**WorkinLonghorn** · 01-03-2008, 11:53 AM

Alright,it was a leap,the guy shoulda been changing the oil.

70' GMC · 01-03-2008, 04:36 PM

Quote:

Originally Posted by WorkinLonghorn

Alright,it was a leap,the guy shoulda been changing the oil.

I changed the oil in late october, and the oil was getting a quart every two weeks. Now the oil is almost a quart a month.

**WorkinLonghorn** · 01-03-2008, 07:19 PM

You're sure it isn't leaking?

70' GMC · 01-04-2008, 01:30 AM

Where would I look? around oil pan and maybe the valve covers?

**special-K** · 01-04-2008, 01:32 AM

Sounds like you`re breaking it in.Race cars change their oil alot more often than 3,000 miles.Hi-RPMs break the oil down alot quicker than normal driving.Think...burnouts,haulin`ass...

greasemonkey · 01-04-2008, 06:13 AM

Quote:

Originally Posted by WorkinLonghorn

You're sure it isn't leaking?

Quote:

Originally Posted by 70' GMC

Where would I look? around oil pan and maybe the valve covers?

Try looking at the ground first, usually if it is leaking badly enough to lose quarts of oil you will see evidence in your normal parking spot. It you do find fresh oil on the ground, it is probably the oil pan, valve covers, intake manifold, and/or rear main seal (it is a SBC, after all).

Kager67 · 01-04-2008, 04:39 PM

1,500+ views and 80+ responses on when to change your oil? I'll have to admit I didn't see that one coming!

01-03-2008, 06:45 AM	#76
smitty62 Registered User Join Date: May 2002 Location: North Carolina Posts: 1,234	Re: The oil is not even 3,000 miles "Royal Purple is synthetic racing oil...supposed to get ya 10 hp" Don't forget one of those magnetic fuel line thingies from JC Whitney..that should be worth 20 hp easy!! __________________ Stepsides look like real trucks! Smitty

01-03-2008, 10:36 AM	#77
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,859	Re: The oil is not even 3,000 miles I had a SBC "rebuilt" and it continued to burn lots of oil (qt./500 miles)for 20,000 miles and during this time the oil got black pretty quickly. Then suddemly it stopped burning/turning black.A quart would last past 1000 miles and didn't darken so much.So I switched to synthetic (Mobil-1). It is my belief that the "builder" didn't prep the cylinders correctly,or mismatched the rings to the job and break-in was delayed. This could be happening here too. What is your oil consumption rate? __________________ '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.

01-03-2008, 11:26 AM	#79
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,859	Re: The oil is not even 3,000 miles Noted. OP seemed to think his oil got black quickly and I noticed the same thing in a motor that wouldn't break-in.Sorry if that seems like a "leap". __________________ '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.

01-03-2008, 11:50 AM	#80
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: The oil is not even 3,000 miles ...time!!...again __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 01-03-2008 at 11:53 AM.

01-03-2008, 11:53 AM	#81
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,859	Re: The oil is not even 3,000 miles Alright,it was a leap,the guy shoulda been changing the oil. __________________ '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.

01-03-2008, 07:19 PM	#83
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,859	Re: The oil is not even 3,000 miles You're sure it isn't leaking? __________________ '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.

01-04-2008, 01:30 AM	#84
70' GMC HERE.......Somewhere Join Date: Oct 2006 Location: Birmingham AL Posts: 2,488	Re: The oil is not even 3,000 miles Where would I look? around oil pan and maybe the valve covers? __________________ Current rides: 2013 Hyundai elantra gt DD 1995 camaro my first crush lmao Was: 1970 with a 350 4barrel and 288 horses Classics make it possible!

01-04-2008, 01:32 AM	#85
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: The oil is not even 3,000 miles Sounds like you`re breaking it in.Race cars change their oil alot more often than 3,000 miles.Hi-RPMs break the oil down alot quicker than normal driving.Think...burnouts,haulin`ass... __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

01-04-2008, 04:39 PM	#87
Kager67 what knocking sound? Join Date: Feb 2005 Location: good ol North Dakota Posts: 148	Re: The oil is not even 3,000 miles 1,500+ views and 80+ responses on when to change your oil? I'll have to admit I didn't see that one coming! __________________ 1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS



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