MonteC Posted July 31, 2005 Report Share Posted July 31, 2005 what are some better gas mileage tips? things i know of: tune up k&n air filter tire pressure anything else? Quote Link to comment Share on other sites More sharing options...
BurneroftheRice Posted July 31, 2005 Report Share Posted July 31, 2005 FUEL FILTER! (a common oversight) also keep yer damn foot off the gas! leaving the RPMs as low as you need to will give you better gas milage Quote Link to comment Share on other sites More sharing options...
pitzel Posted July 31, 2005 Report Share Posted July 31, 2005 0W-30 motor oil. 40psi in the tyres. Minimal use of brakes. A clean throttle body. Using the AC instead of having the windows rolled down. Quote Link to comment Share on other sites More sharing options...
Supreme Cutlass Posted July 31, 2005 Report Share Posted July 31, 2005 Using the AC instead of having the windows rolled down. Should be vice versa; the compressor puts drag on the engine reducing mileage. Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted July 31, 2005 Report Share Posted July 31, 2005 70 mile trip with my friend's '97 GTP: 22 MPG no A/C 1 way. 24 MPG w/AC the other way. The road is flat as hell too. The windows being down create a HUGE drag on the car, especially travelling down the interstate. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted July 31, 2005 Report Share Posted July 31, 2005 70 mile trip with my friend's '97 GTP: 22 MPG no A/C 1 way. 24 MPG w/AC the other way. The road is flat as hell too. The windows being down create a HUGE drag on the car, especially travelling down the interstate. yeah, at 70mph they are. Driving in town, at low speeds, no A/C is better. Air resistance increase with the SQUARE of velocity. Anyway, tune up, K&N gave me 2-3mpg and a better exhaust. I get 33+ on the highway with a 170,000 mile 3.1L Quote Link to comment Share on other sites More sharing options...
MonteC Posted July 31, 2005 Author Report Share Posted July 31, 2005 hmm, exhaust. what size for a stock 3.1 would benefit the most? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted July 31, 2005 Report Share Posted July 31, 2005 in our cars the compressors seem prety efficent, so they really don't make that much a difference at all on the highway. Quote Link to comment Share on other sites More sharing options...
mihela816 Posted July 31, 2005 Report Share Posted July 31, 2005 Not having a 3 speed? Quote Link to comment Share on other sites More sharing options...
Heza Posted July 31, 2005 Report Share Posted July 31, 2005 Using the AC instead of having the windows rolled down. Should be vice versa; the compressor puts drag on the engine reducing mileage. anyone see the myth busters episode with that issue? i did. they had two ford explorers both with 5 gallons of gas in them. took them too a track. one windows down, other with AC on. started driving cruising at 40 the whole time. the ford explorer with windows down went an extra 30 laps than the one that had the AC on. in my GTP, when i had it loaded down coming home from the military, i got 19 mpg with the AC on. AC off is more feel efficient in my eyes. atleast on the 3.4 it is. Quote Link to comment Share on other sites More sharing options...
gp90se Posted July 31, 2005 Report Share Posted July 31, 2005 take out all the interior, the spare, go take a jog plugs/wires/filters/pcv valve/air filter/fuel filter, tranny fluid (picked up 2mpg in my father minivan), 5w30 (0-30 and the 3.1s is really pushing old gaskets), top end cleaner, tires inflated . but like everyone has been saying, keep ya foot outta it, the mpg stay up. Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted July 31, 2005 Report Share Posted July 31, 2005 hmm, exhaust. what size for a stock 3.1 would benefit the most? 2.5" is the most you would want to go, but most 3.1's came with 2.25" I use 10w-30 and I get about 25 around town, although like everyone says, I keep my foot out of it. Quote Link to comment Share on other sites More sharing options...
Prospeeder Posted July 31, 2005 Report Share Posted July 31, 2005 i use 10w-30, thats what the 3.1T needs, do the 3.1 n/a just need 5w-30? also good gas gets u better gas mileage, like, if u go to Wong tong chongs waterd down gas instead of Shell or Cheveron, ull get worse milage, plus its bad for ur car Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted July 31, 2005 Report Share Posted July 31, 2005 I duno, I use 10w-30 in the summer, and 5w-30 in the winter. Honestly, I dont even know what the 3.1's call for. But when your off the gas, you can always through it into neutral and drop the RPM's down to idle Quote Link to comment Share on other sites More sharing options...
SilverZ Posted July 31, 2005 Report Share Posted July 31, 2005 I use 5w30 castrol synthetic in my 94 3.4l all year round and also I definetly get better gas mileage with the a/c off then with its on.... Quote Link to comment Share on other sites More sharing options...
gp90se Posted July 31, 2005 Report Share Posted July 31, 2005 I use 5w30 castrol synthetic in my 94 3.4l all year round and also I definetly get better gas mileage with the a/c off then with its on.... thats not the argument, you obviously get better mpg with it off, but do u get better mpg with it off and the windows down or with the windows up and the ac on Quote Link to comment Share on other sites More sharing options...
Heza Posted July 31, 2005 Report Share Posted July 31, 2005 hmm, exhaust. what size for a stock 3.1 would benefit the most? 2.5" is the most you would want to go, but most 3.1's came with 2.25" I use 10w-30 and I get about 25 around town, although like everyone says, I keep my foot out of it. most 3.1s came with 2". all 3.4s got 2.25" to the Y then 2" from there. Quote Link to comment Share on other sites More sharing options...
pitzel Posted August 1, 2005 Report Share Posted August 1, 2005 5w30 (0-30 and the 3.1s is really pushing old gaskets), top end cleaner, tires inflated . Most 0W-30's are thicker than 5W-30's. Your comment doesn't make a lot of sense. Quote Link to comment Share on other sites More sharing options...
gp90se Posted August 1, 2005 Report Share Posted August 1, 2005 that makes no sence what so ever. while the engine is cold, a 5w-30 acts as a 5w, where a 0w-30 will act like a 0 weight. on old gaskets, you have more of a chance of more leaks with thinner oil, 0w-30 Quote Link to comment Share on other sites More sharing options...
pitzel Posted August 1, 2005 Report Share Posted August 1, 2005 that makes no sence what so ever. while the engine is cold, a 5w-30 acts as a 5w, where a 0w-30 will act like a 0 weight. on old gaskets, you have more of a chance of more leaks with thinner oil, 0w-30 Yes, it is kind of weird, but let's compare Mobil-1 0W-30 with Mobil-1 5W-30 at operating temperature: http://www.mobil.com/Canada-English/Lubes/PDS/IOCAENPVLMOMobil_1_0W-30.asp cSt @ 100ºC 10.3 And M1 5W-30: (http://www.mobil.com/Canada-English/Lubes/PDS/IOCAENPVLMOMobil_1_5W-30.asp ) cSt @ 100ºC 10 And M1 15W-50: (http://www.mobil.com/Canada-English/Lubes/PDS/IOCAENPVLMOMobil_1_15W-50.asp ) cSt @ 100ºC 17.4 A higher cST number means a 'thicker' oil. Strange, eh? And if you do the same for Castrol's 0W-30 product, or Wal-Mart's 0W-30 product, or most other 0W-30 products, they will be generally slightly thicker at operating temperature than their counterparts. Yet the fuel economy will be better during startup because they are thinner at startup, and the thickness during high-temperature operation gives better wear protection and better ring seal. Do leaks generally occur from hot engines, or from cold engines?? (hypothetical question -- I don't know the answer) Quote Link to comment Share on other sites More sharing options...
gp90se Posted August 1, 2005 Report Share Posted August 1, 2005 good to know, doesnt really make a lotta sence but hey, what ever does? Quote Link to comment Share on other sites More sharing options...
xN8x Posted August 1, 2005 Report Share Posted August 1, 2005 http://www.w-body.com/forum/viewtopic.php?p=380675#380675 Acetone helps/hurts ? Quote Link to comment Share on other sites More sharing options...
gp90se Posted August 1, 2005 Report Share Posted August 1, 2005 Wouldnt do that 2 any car I drive, no way no how. Could burn an injector, weakin a fuel hose, etc etc. not a risk I would take Quote Link to comment Share on other sites More sharing options...
THe_DeTAiL3R Posted August 1, 2005 Report Share Posted August 1, 2005 If I still had my 88 GP kickin around I'd try it out.. but not on my 95. It would probably kill the LIM gasket or something. Quote Link to comment Share on other sites More sharing options...
xN8x Posted August 1, 2005 Report Share Posted August 1, 2005 Once I get a new car, I'd like to try it in my cutlass. It would make a very nice guinea pig. Quote Link to comment Share on other sites More sharing options...
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