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Buick Roadmaster General and Technical discussion for the B-Body Buick Roadmaster (1991-1996) and Oldsmobile Custom Cruiser (1991-1992).

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Old 10-07-2009, 05:54 AM   #1 (permalink)
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Cool updating your cars pc for better fuel milage

would doing this at your local gm garage help in getting better fuel milage, being there is 250,000 miles on my roadmaster, & 144,000 on my fleetwood Cadilliac, being they both have the same engines & drive trains.

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Old 10-07-2009, 08:20 AM   #2 (permalink)
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What kind of mileage are you getting now?

Really you should do a little background work first. Full tuneup, make surte all scheduled maintenence is caught up, then get a CAI and a custom tune.

I doubt a GM dealership would modify a pcm's programming. They would be happy to restore it to factory specs but that's probably it.

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Old 10-07-2009, 10:17 AM   #3 (permalink)
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First, I know I'm outside of my box here...so admins don't kill me.

Second. I'd recommend a good throttle body cleaning and seafoam the engine as well. Get a good chunk of carbon out of the cylinders, crankcase and valvetrain before you do that tune-up.

Also, you can get a Dyno tune place to tune your car for best effciency over performance. $400 might save you a couple thousand in the long run. I know that with my mpg increase (again, outside my box), I'm saving on average $1000 in gas for every 10,000 miles I drive.

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Old 10-13-2009, 10:34 AM   #4 (permalink)
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Quote:
Originally Posted by RoadMonster View Post
Good advice.

Anyone tried a Motorvac treatment?
Never heard of it. What is it? I'm thinking the wife's GA could use some TLC.

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Old 10-13-2009, 10:38 AM   #5 (permalink)
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Quote:
Originally Posted by wanderson75 View Post
First, I know I'm outside of my box here...so admins don't kill me.

Second. I'd recommend a good throttle body cleaning and seafoam the engine as well. Get a good chunk of carbon out of the cylinders, crankcase and valvetrain before you do that tune-up.

Also, you can get a Dyno tune place to tune your car for best effciency over performance. $400 might save you a couple thousand in the long run. I know that with my mpg increase (again, outside my box), I'm saving on average $1000 in gas for every 10,000 miles I drive.
IVE GOT A GUY HERE IN COLORADO THAT DOES FULL DAY DYNO FR AROUND $100 TO $200 IVE HEARD THATS CHEAP!!!!!

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Old 10-19-2009, 12:48 PM   #6 (permalink)
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Quote:
Originally Posted by RoadMonster View Post
http://www.motorvac.com/products/Car...anDual352.html

I have never used it, but I have heard of nothing but good comments from guys who have had their car serviced with this.
Hmm.. I'll have to make some phone calls and see if anyone locally uses it. Thanks!

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