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#1
04-18-2014, 05:27 PM
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What engine oil does everyone use for ZDDP?
I am concerned about the lack of ZDDP (zinc) in the newer motor oils. I have heard that a lack of ZDDP can potentially cause damage in engines designed to run with it. I have learned that some people are running diesel oil in older cars because there is still ZDDP in these oils. Is anybody here doing this? And if so, what brand and viscosity is recommended?
My '72 GTO has an unmodified 400 engine, and I think the oil spec is SAE30.
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______________________________________________ 1972 Pontiac GTO 400ci TH-400 (restoration project) I know what I like, and I like what I know! |
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#2
04-18-2014, 05:38 PM
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I have had good luck using the Lucas zinc-plus additive.
__________________
1969 GTO hard top ~ Std bore 400, '70-RA3 block, 670 heads, Bal. & Blue... M22, 12-bolt w/3:55s |
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#3
04-18-2014, 05:44 PM
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I run 10w40 Brad Penn in the GTO and 0w40 Mobil 1 in the Camaro. Both have enough ZDDP in the oil so no additives are needed. Mobil 1 15w50 also has plenty of ZDDP - I just didn't want to run that heavy an oil in the GTO as I do occasionally drive the car in colder temps.
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#4
04-18-2014, 05:45 PM
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I've been running diesel-spec Rotella in my '67 (stock engine) for the past 10 years or so without issue. I understand even the diesel spec stuff is getting rid of the ZDDP, though. I also add a bottle of MOA additive from BG. The stock spec oil is 10w30 for these engines, which I recommend. The Rotella is typically 15w-40, which is a bit thick, but out where I am, it's very hot most of the time, so I'm ok with it. The main thing to avoid is racing oil of any kind, as it lacks the additives necessary to protect your engine under daily driving conditions.
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Jeff 
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#5
04-18-2014, 06:19 PM
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Valvoline Racing VR-1 oil.And a dose of ZDDPlus for good measure.
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2001 Trans Am,WS6 Sunset Orange Metallic (sold) 1973 Trans Am 455,4speed 1970 GTO |
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#6
04-18-2014, 06:24 PM
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Straight Valvoline VR-1 Racing Oil.
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#7
04-18-2014, 06:58 PM
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VR-1 as well
__________________
71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#8
04-18-2014, 07:00 PM
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I was about to ask the same question.
Right now Im running off the shelf oil with a zddp additive, but Im looking for an oil that doesn't need an additive.
__________________
"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#9
04-18-2014, 07:22 PM
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Engine Oil
Quote:
Joe Gibbs and Brad Penn have similar offerings. |
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#10
04-18-2014, 07:31 PM
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10w30 VR-1
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37 Pontiac Sedan 455 700r4 94 Firehawk Supercharged 5.7 LT1 6spd. 77 Grand Prix base model, 350 pontiac 97 F250 7.3 turbo diesel 85 CJ7 Laredo 65 Impala SS 396, 4 spd, A/C. |
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#11
04-18-2014, 07:37 PM
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oil
Brad Penn 10W40 and a Baldwin B9 filter.
great gauge response and good hot pressure. Gerry
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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
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#12
04-18-2014, 07:58 PM
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Brad Penn for me also. Be sure and get the bottles that say Grade 1 on them.
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#13
04-18-2014, 08:06 PM
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BRADS PENN
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color me gone |
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#14
04-18-2014, 08:09 PM
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Delo 15W40 with 1 bottle of ZDDP.
__________________
The 1967 Rustbelt Refugee. Work in progress. Donations accepted. - 467 Cubic Inch EFI Pontiac, Megasquirt II v.3.O ECU, 700R4, 3.55 gears - Best 1/4-mile ET: 12.79 @ 107.36 MPH - Best Fuel Economy: 18.47 MPG ...That's no GTO, that's a Tempest! 
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#15
04-18-2014, 09:44 PM
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Delo 15W40 and nothing else since 2001-2002 or so. No problems and tens of thousands of miles on many engines.
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#16
04-18-2014, 09:48 PM
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any conventional 10-40 and a bottle of ZDDP.
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#17
04-18-2014, 09:56 PM
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Brad Penn and a bottle of ZDDP.
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" Is wearing a helmet illegal" Mike Kerr 1-29-09 |
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#18
04-18-2014, 10:02 PM
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Did use Mobil1 with a bottle of additive. Now I use Mobil1 for high mileage engines which Mobils website shows has more ZDDP than regular Mobil1.
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#19
04-18-2014, 10:16 PM
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brad penn
agreed with andy must say grade 1
__________________
1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, DUI HEI and Ram Air pans and RARE Long Branch Manifolds |
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#20
04-19-2014, 12:22 AM
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there is an additive product approved by Continental. Lycoming and the FAA for use in aircraft engines. its runs about 8-11 bucks for a bottle. it has all the good stuff in it. those engines cost beteen 20-60 thousand dollars each so its not snake oil. Aircaft spruce sells it.
dont use too much of any additive or it will cause corrosion of some brass and parts. Many who build antique motorcycles learned this the hard way |
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