Fuel & Oil (what's recommended) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kombreeze · 07-14-2006, 11:25 AM

I was told by a budy of mine that my heads on my truck wouldn't last. That I should prepair a set of 350 heads for when the 327 heads go out. I never realy asked what ocatan should I run on my stock 327. The only mods are bolt edelbrock car, intake, headers and HEI....

My next question is what oil should I run. I'm assuming she's and original running engine wourse case scenerio one rebuild and she doesn't burn oil that I can see. Drove her 400 miles and the dipstick marks the same.....I was thinking castrol or valvoline high miles...what do you guys use for simular application. She's just to drive around with my kids....and look great while doing it....

**Stocker** · 07-14-2006, 08:25 PM

The problem with your 327 heads isn't caused by the wrong octane, it's from the lack of leaded fuel. Tetraethyl lead (I think that's what it was called) was used in all gasolines when that 327 was a modern engine, and it lubricated the valve seats, reducing wear. Unleaded fuel will cause the seats to wear more rapidly, though you may be able to put a lot of miles on the engine without problems. When older heads are rebuilt, steel seats are typically inserted. Your octane requirement will depend on your engine specs and how you drive. If it runs fine on regular and doesn't ping, don't pay extra for increased octane.

As to oil, I would just use any brand-name 10W-30. I *think* some of the 'high-mileage' oils tend to soften the seals; not necessarily a good thing. Others will chime in...

neonlarry · 07-14-2006, 08:30 PM

I run nothing but synthetic oil in all my vehicles. Does it work? Can't say for sure but I have one with 365K and another with 330K on them.

Psycho71 · 07-14-2006, 08:51 PM

On regular types of oil, I run Valvoline, and Valvoline. Always have, Always will. Some oils will foam at higher rpm or with high volume pumps, and that aint good. I do not know who else's oil won't foam, but I know Valvoline doesn't (from MANY dirt track, and drag racers). Never ran synthetic oil, so no advice there.

As stated before, the 327 heads are having issues due to lack of leaded fuel, but that's already been covered.

Jay

krue · 07-14-2006, 09:27 PM

I've always run Castrol in my vehicles, never had a problem with it.

Longhorn Man · 07-14-2006, 10:08 PM

I am a supporter of synthetic, but I wouldn't run it in a mystery motor.
I run vavoline oil, and a NAPA filter... nothing but.
As for the 350 heads statement... I'd recomend 305 heads in all reality. They are a dime a dozen (can probably score the whole engine for free if you look around) they are good for todays fuel, they have smaller chainbers to keep your compression ratio up, and, the small valves will help keep the intake charge velosity high, which helps distribute the intake charge in the cylunder before compression, and tends to leave a cleaner burn.

Sweet72 · 07-14-2006, 10:30 PM

Stocker is right on with the fuel recommendation. I have always used Valvoline but since the EPA has legislated the zinc (additive that flat tappet engines need to survive) out of most engine oils, I'll be using Rotella T. Chevron Delo 400, and Mobil DELVAC also designed as diesel engine oils, contain this additive.

**truckdude239** · 07-15-2006, 09:51 AM

Castrol gtx 10w40 in all mine

07-14-2006, 11:25 AM	#1
kombreeze Registered User Join Date: Jul 2006 Location: Fresno, Ca Posts: 154	Fuel & Oil (what's recommended) I was told by a budy of mine that my heads on my truck wouldn't last. That I should prepair a set of 350 heads for when the 327 heads go out. I never realy asked what ocatan should I run on my stock 327. The only mods are bolt edelbrock car, intake, headers and HEI.... My next question is what oil should I run. I'm assuming she's and original running engine wourse case scenerio one rebuild and she doesn't burn oil that I can see. Drove her 400 miles and the dipstick marks the same.....I was thinking castrol or valvoline high miles...what do you guys use for simular application. She's just to drive around with my kids....and look great while doing it....

07-14-2006, 08:25 PM	#2
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,732	Re: Fuel & Oil (what's recommended) The problem with your 327 heads isn't caused by the wrong octane, it's from the lack of leaded fuel. Tetraethyl lead (I think that's what it was called) was used in all gasolines when that 327 was a modern engine, and it lubricated the valve seats, reducing wear. Unleaded fuel will cause the seats to wear more rapidly, though you may be able to put a lot of miles on the engine without problems. When older heads are rebuilt, steel seats are typically inserted. Your octane requirement will depend on your engine specs and how you drive. If it runs fine on regular and doesn't ping, don't pay extra for increased octane. As to oil, I would just use any brand-name 10W-30. I think some of the 'high-mileage' oils tend to soften the seals; not necessarily a good thing. Others will chime in... __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

07-14-2006, 08:30 PM	#3
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Re: Fuel & Oil (what's recommended) I run nothing but synthetic oil in all my vehicles. Does it work? Can't say for sure but I have one with 365K and another with 330K on them. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

07-14-2006, 08:51 PM	#4
Psycho71 Registered User Join Date: Jan 2006 Location: Kaufman, Tx Posts: 827	Re: Fuel & Oil (what's recommended) On regular types of oil, I run Valvoline, and Valvoline. Always have, Always will. Some oils will foam at higher rpm or with high volume pumps, and that aint good. I do not know who else's oil won't foam, but I know Valvoline doesn't (from MANY dirt track, and drag racers). Never ran synthetic oil, so no advice there. As stated before, the 327 heads are having issues due to lack of leaded fuel, but that's already been covered. Jay __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. If a hammer doesn't fix it, you have an electrical problem! Slot Cars, 1:24 Scale, 100MPH@100,000RPM, fastest things on wheels!

07-14-2006, 09:27 PM	#5
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	Re: Fuel & Oil (what's recommended) I've always run Castrol in my vehicles, never had a problem with it. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-14-2006, 10:08 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Fuel & Oil (what's recommended) I am a supporter of synthetic, but I wouldn't run it in a mystery motor. I run vavoline oil, and a NAPA filter... nothing but. As for the 350 heads statement... I'd recomend 305 heads in all reality. They are a dime a dozen (can probably score the whole engine for free if you look around) they are good for todays fuel, they have smaller chainbers to keep your compression ratio up, and, the small valves will help keep the intake charge velosity high, which helps distribute the intake charge in the cylunder before compression, and tends to leave a cleaner burn.

07-14-2006, 10:30 PM	#7
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: Fuel & Oil (what's recommended) Stocker is right on with the fuel recommendation. I have always used Valvoline but since the EPA has legislated the zinc (additive that flat tappet engines need to survive) out of most engine oils, I'll be using Rotella T. Chevron Delo 400, and Mobil DELVAC also designed as diesel engine oils, contain this additive. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

07-15-2006, 09:51 AM	#8
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: Fuel & Oil (what's recommended) Castrol gtx 10w40 in all mine __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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