I know this may get stopped but id like your guys opinions on this.
What kind of motor oil is the best
I was washed into using penzoil all my days but i know there is better out there
what do you guys use
penzoil
valvoline
mobil 1
castrol
royal purple
Would like some opinions
thanx 4 your time
JMP 1999

 

If you want the best, use mobil 1. I've taken apart engines using the old stuff and synthetic oils.. its like night and day.

 

penzoil is the last one you should use. The additves that are in it make it turn prematurely black before other oils.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

I use Penzoil because I change my oil and oil filter every 3000 miles. I'm also a believer in method before product when it comes do fluids. If you don't flush a radiator before changing coolant, if you don't change oil filter when you change the oil, when you overfill the rear diff, overfill power steering, overfill tranny fluid. Do it right, don't expect a product to save your *** if you forget because THAT is the real risk. I will say that oils are getting more advanced and that the synthetics are looking better now that the price isn't so bad.

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, Jon (350 TBI!)
91 Red My website

 

Mobil 1.
Did really well in all the bearing tests, EP tests, and high-heat tests I witnessed. All tests done by an independant group, BTW.
Castrol was also a good performer. Castrol's conventional is one of the best conventionals, but go with the synthetic.

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No guts, no glory.

 

Mobil 1

 

Mobil 1 (or Redline...more expensive).
Used nothing but Mobil 1 after my 92 was broken-in and 305 TBI motor was still running perfect (when replaced with 350) after 225,000 miles.Never had the heads or intake off it!My 91 S10 blazer also running Mobil 1 has 210,000 miles and counting on original 4.3L V6.Friends used to say synthetic oil was a waste of money, but they're all starting to use it now!

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1992 RS,5 Speed,T-Tops,Eibach Springs(cut), KYB's, Lakewood Trailing Arms and Adjustable Panhard Bar,Posi Disc Rear,3.73 Gears,Summit Rearend Support Cover,
Del-A-Lum Bushings,300 HP Crate Motor,Crane Comp-U-Cam,Edelbrock TBI Intake, Turbo City Ported Throttle Body and Adjustable Fuel Pressure Regulator,Open Element
Air Cleaner, Ground Control Strut Tower Brace and Caster/Camber Adjusters,SLP 1-5/8" Headers,Flowmaster 3" American Thunder Exhaust,3" Cat,Centerforce Dual
Friction Clutch,Hayes Billet Flywheel,B&M Power Steering Cooler,Big Thumpin' Stereo.

 

I was using Mobil 1 in the '87 before I sent it into early retirement with an accident but that was at 220K miles on an original engine. I bought my '91 used and had no idea what had been put into it so I've been using regular Mobil and Castrol instead of synthetics for fear that the smaller molecules of the synthetics might actually clean my engine out and cause blow-by.

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~Luke
'91 Firebird :: L03/700R4 ::
Mods: Catco cat - Flowmaster 80 series - B&M Shift kit - TA tail lights - GTA rims - K&N - MacEwen guages
Stereo: Pioneer DEH-P8200R - Cadence 4x6's - Pioneer 6x9's - Kicker amps - Kicker 10" CompVR
::R.I.P.::'87 Firebird - Firebird parts - Selling an '80 Firebird for a friend
Moderator of tranny board over at TransAmGTA.com

 

He is right. Synthetics "clean" the motor so well that blowby and gasket/seal leaks are common problem in older engines that were mainly used on conventionals but later switched over to synthetics.

 

That's called gunk. That's what an oil with a detergent does (as if you can easily buy oil that doesn't have detergents ). It cleans out the gunk and turns black.

Just bored and being a smart ace. No blood no foul right?

AJ

 

OOPPSS

[This message has been edited by AJ_92RS (edited September 27, 2001).]