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View Poll Results: Which oil do you use? | |||
Amsoil |
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79 | 22.13% |
Castrol |
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19 | 5.32% |
Champion |
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0 | 0% |
Chevron |
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0 | 0% |
Conoco |
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0 | 0% |
Citgo |
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0 | 0% |
Havoline |
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1 | 0.28% |
Interstate |
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0 | 0% |
Kendall |
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1 | 0.28% |
Lowe |
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0 | 0% |
Marathon |
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0 | 0% |
Mobil 1 |
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224 | 62.75% |
Motorcraft |
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0 | 0% |
National |
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0 | 0% |
PennZoil |
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4 | 1.12% |
Quaker State |
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3 | 0.84% |
Redline |
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10 | 2.80% |
Royal Purple |
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11 | 3.08% |
Valvoline |
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5 | 1.40% |
Voters: 357. You may not vote on this poll |
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#71 |
![]() Join Date: Aug 2011
Location: Evergreen, Co.
Posts: 346
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Mobile 1 high Mileage 10-30 recommended by Halbeck due to right zinc levels.
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Bert Rankin 1991 ZR1 Steel Blue / Steel Blue #1029 Haibeck chip, slotted rotors, camber brace, C-beam plates, OBX exhaust, Nitto NT555 tires [SIGPIC][/SIGPIC] |
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#72 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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This poll should have been set up to change your vote. (not sure there is that feature) I'm going to be trying Royal Purple or that new Casterol (caster oil) stuff and can't change my vote.
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#73 |
![]() Join Date: May 2011
Location: Sydney, Australia
Posts: 2,479
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I think Mark H. has been Recommending Amsoil AMO10W40.
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Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car |
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#74 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Castrol GTX 15-W40 Diesel.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#75 |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Considering the well established fact that ZDDP is important to flat tappet motors (from personal experience with a SBC motor too), If I assume those indicating Mobil 1 are using the oil of the current API "SN" rating (read: much reduced ZDDP levels), am I alone or does that bother anyone else to think so many ZR-1s are "in harms way"? ARE they in harms way?
p.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 08-08-2012 at 01:53 PM. |
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#76 | |
Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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#77 | |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Put another way... If the high percentage of use is based solely on that sticker under the hood of all 92+ MY Vettes, then there is potential for problems and it knaws at me (though oil - related problems don't seem to appear all that much - on this board at least). Maybe ZDDP in the LT5 is not that big a deal (to some). But, I can't see me rolling the dice on mine - Make mine synthetic w/ ZDDP comiserate with 1990. I'm just sayin...the graph bugs me cuz it (to me) clearly recommends the wrong stuff. ![]() P.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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#78 | |
Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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From what I've seen in other posts, I'd guess maybe 30-40% of the Mobil 1 users are using the High Mileage formula. That's a WAG though, with no facts to back it up.
Some thoughts to consider, though, include the fact that spring pressures are less in the LT5 as compared to an OHV flat-tappet motor, so the importance of the zinc content may be less. Also, improvements in oil technology in the last 20 years may mean that even without the zinc, there's still adequate protection of those camshaft lobes and lifter faces. Quote:
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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#79 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Paul,
I'm one of the guys that changes the oil in his "toy" cars every 2,000mi along w filter. Did that with the 84 also. So High Mileage or Synthetic means nothing to me. The Castrol Diesel has the ZDDP levels needed at the price of regular oil ($4.50/qt) and I've used the GTX stuff for over 30 years. The issue of ZDDP never came up w my 84 and as you know that was a flat tappet motor. I converted over to a full roller setup in 2000 for performance not the ZDDP issue. I have posted pics of the new cams in my LT-5 motor after about 2500mi of use. Lobes look like new.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#80 | |
![]() ![]() Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Dom, have you compared the ZDDP data from a few yrs ago vs today's levels in the Castrol you're buying? I'm told that the levels were dropped when catalytic converters were required on the big rigs.
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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