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Best Oil? Carbureted '89 Firebird

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Old Oct 24, 2019 | 01:40 PM
  #1  
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From: Ohio
Car: 1989 Pontiac Firebird
Engine: V8, CSM 305
Transmission: Stock (for now...)
Axle/Gears: Stock (for now...)
Best Oil? Carbureted '89 Firebird

I know that Oil is a really important element for my car, and right now I'm using Valvoline 10W-30.
However, I've gotten some people telling me that Mobil 1 is a better option for carbureted engines.

How does a carbs needs differ from Fuel Injection in terms of oil?
Recommendations?

Thanks!

AvianWing
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Old Oct 24, 2019 | 01:51 PM
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Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Best Oil? Carbureted '89 Firebird

Carbs like to foul the oil with tons of unburned fuel - especially on cold start. This leads to dramatically shorter engine life from fuel dilution and cylinder washing and there's really no oil that's going to stop it. Whatever you use it should be changed often. I would buy an inexpensive synthetic and change it at least every 2500 miles since this is obviously an aftermarket carb that likely has some pretty rich tuning and none of the 80's advancements such as the E4ME Q-Jet had that would reduce fuel dilution, etc.

Best thing you can do for engine life and oil life is put the fuel injection back on.

GD
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Old Oct 24, 2019 | 02:20 PM
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Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
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Axle/Gears: 10-bolt/3.73 ..
Re: Best Oil? Carbureted '89 Firebird

Here in the 21st century, oil brands don't matter. Use the proper rating & viscosity, and change oil when it needs to be changed. The intervals depend on how the car is used, environment, etc. It's not a "one size fits all" number. I see no point in running a synthetic in a high-mileage engine, but that's just me...

Last edited by T.L.; Oct 24, 2019 at 05:38 PM. Reason: Typographical error
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Old Oct 24, 2019 | 03:14 PM
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Re: Best Oil? Carbureted '89 Firebird

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Old Oct 24, 2019 | 04:02 PM
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Re: Best Oil? Carbureted '89 Firebird

Question ; Best Oil ?

Answer ; CLEAN !

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Old Oct 26, 2019 | 01:06 PM
  #6  
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Re: Best Oil? Carbureted '89 Firebird

EVery day this comes up on every forum. There is no magic oil period
Pricy cheap doesnt matter..as said keep it clean and use a good filter.
None will magically give you tons more life than the other. I run cheapo oil for my daily and a wix filter almost 200k and runs like a top.
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Old Oct 30, 2019 | 12:44 AM
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Re: Best Oil? Carbureted '89 Firebird

Advanced auto parts is clearancing out 10W30 Mobil Synthetic DIRT cheap


Dave
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Old Nov 3, 2019 | 06:51 PM
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Re: Best Oil? Carbureted '89 Firebird

Originally Posted by cuisinartvette
EVery day this comes up on every forum. There is no magic oil period
Pricy cheap doesnt matter..as said keep it clean and use a good filter.
None will magically give you tons more life than the other. I run cheapo oil for my daily and a wix filter almost 200k and runs like a top.
Project Farm on YouTube, many white papers authored by governing bodies and manufacturers, and API oil ratings beg to differ.

While none are magic is correct there are differences between oils that, depending on your usage, can make a difference.
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Old Nov 3, 2019 | 08:37 PM
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Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: Best Oil? Carbureted '89 Firebird

Originally Posted by Tibo
Project Farm on YouTube, many white papers authored by governing bodies and manufacturers, and API oil ratings beg to differ.

While none are magic is correct there are differences between oils that, depending on your usage, can make a difference.
Any "difference" is negligible...
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Old Nov 4, 2019 | 08:14 AM
  #10  
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Re: Best Oil? Carbureted '89 Firebird

Originally Posted by T.L.
Any "difference" is negligible...
For a grocery-getter, sure.
I think you could stand to do some more reading on engine oil tests. Here are two quick and good reads by AMSOIL
http://wpc.1c96.edgecastcdn.net/001C...ml5/index.html
http://wpc.1c96.edgecastcdn.net/001C...ved/index.html
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Old Dec 6, 2019 | 10:31 PM
  #11  
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Car: 1986 trans am
Engine: 305/350
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Re: Best Oil? Carbureted '89 Firebird

the consensus is "it isn't the type of oil you use" (and in older,higher mileage carbed vehicles i personally would not use synthetic)
" its the matter of changing it at or before the recommended frequency with an oil filter that DOES NOT SAY FRAM ON IT..."
(worst filters made,period)
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