MPG help!?
#1
MPG help!?
I picked up my G35 a month or two ago and it has 126k on it now. But I am getting terrible MPG 15 to be exact with some interstate thrown in there. I have new Sumitomo 18' tires got tranny oil and engine oil done. I had 18 then I put Lucas Oil fuel system cleaner in the gas tank and it dropped to 15 on the last 3 tanks. I always use premium gas, and that's with me going 45 on city and 60 interstate. Only gets above 3000 RPMs maybe 5 percent of the time. Tips?
Last edited by CharlesCather; 06-22-2014 at 07:31 PM. Reason: More info
#2
Registered User
iTrader: (10)
Guarantee you'll get a lot more ideas...
With that kinda mileage have you had the plugs changed? Should have been done at 100K miles! How about your air cleaner filament, if that isn't clean you'll use more gas due to the lack of incoming air? Tire pressure should be 35, I run 37 but that doesn't help me either!
Gary
Gary
#4
I picked up my G35 a month or two ago and it has 126k on it now. But I am getting terrible MPG 15 to be exact with some interstate thrown in there. I have new Sumitomo 18' tires got tranny oil and engine oil done. I had 18 then I put Lucas Oil fuel system cleaner in the gas tank and it dropped to 15 on the last 3 tanks. I always use premium gas, and that's with me going 45 on city and 60 interstate. Only gets above 3000 RPMs maybe 5 percent of the time. Tips?
THE EQuation could look something like this (2.2 divided into 60)
Last edited by slim17265; 06-23-2014 at 04:49 AM.
#5
usually when people talk about "TANKS" they have no clue how to calculate gas mileage. our cars have terrible readings as far as actual guage reading goes...try calculating the correct way. fill tank, note mileage, drive 60 mileas or more, FILL TANK AGAIN and divide gallons used into the mileS DRIVEN ...my car always gets 27.4 (tnpk) on a 6 speed 03 coupe.(63000 miles) bestcar I have ever bought.
THE EQuation could look something like this (2.2 divided into 60)
THE EQuation could look something like this (2.2 divided into 60)
#6
Different pump nozzles can also shut off the flow at different times too. In order to be accurate, you should use the SAME gas pump when calculating MPG.
OP. What sort of driving are you doing? City or highway? If mostly city, i hate to say it but that's pretty much right on. These cars are terrible in the city, and only marginal on the highway. 15-18 is what I see with city driving, and i can squeak out 24-25MPG on long highway drives, but the minute i hit city roads, the MPG drops like a rock
#7
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#8
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iTrader: (10)
#9
#10
I'd change the air filter for sure, and run some Seafoam through the gas tank. Might not hurt to do a Seafoam cleaning in the intake. I just did mine, used the Seafoam spray into the brake line booster/vacuum line. Smoked up the neighborhood pretty good, but felt an immediate response and power increase. There is a video on youtube on how to do it, pretty easy.
Probably wouldn't hurt to change the plugs, clean the MAF, and check the tire pressure. I run 37 psi, just to get a tad less rolling resistance.
Probably wouldn't hurt to change the plugs, clean the MAF, and check the tire pressure. I run 37 psi, just to get a tad less rolling resistance.
#11
Join Date: Mar 2011
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Front and rear cameras, tire pressure for all four tires can display on screen,folding side view mir
The reduced mileage in the center is of local and short distance driving while in Florida.
The four tankfuls prior and the four tankfuls after the lower mileage are all on I 95 using different gas pumps along the way. All 87 octane.
Best mileage calculated on a single tankful was between Ashland, Va and NJ. 300 miles and 10.529 gallons to fill up for 28.49 MPG
Telcoman
#14
The photo below shows my recent round trip from New Jersey to Florida.
The reduced mileage in the center is of local and short distance driving while in Florida.
The four tankfuls prior and the four tankfuls after the lower mileage are all on I 95 using different gas pumps along the way. All 87 octane.
Best mileage calculated on a single tankful was between Ashland, Va and NJ. 300 miles and 10.529 gallons to fill up for 28.49 MPG
Telcoman
The reduced mileage in the center is of local and short distance driving while in Florida.
The four tankfuls prior and the four tankfuls after the lower mileage are all on I 95 using different gas pumps along the way. All 87 octane.
Best mileage calculated on a single tankful was between Ashland, Va and NJ. 300 miles and 10.529 gallons to fill up for 28.49 MPG
Telcoman
And is that photo of an in car computer, and what program is it?