aunggu2002

BEST SOLUTION

Don't let the engine rev above 3,000 RPM for long periods of times.

In city, drive in automatic you should average 17 - 20mpg

In freeways, drive in automatic until your desired crusing speed is reached, then switch to sportstronic for passing power or engine braking. This should average you 25-30mpg easily.

Change spark plugs if you haven't already.

Take all the junk out of your trunk and reduce weight.

And that's about as good as it will get.

CH46ESeaKnight

I'm a TOOL!

Oh wait a min, I forgot I'm a one legged soccer player!

TheWeez

The cost difference from running premium over regular is a couple dollars at the most per tank. There is no reason not to use it.

underst8

Had my 100k tuneup and damnnnnn son. Obvi new oil helps too, but the new spark plugs I think made a huge difference. Maybe the underdrive pulley too, but I just made a roundtrip from minneapolis to chicago and could make the whole thing on two fillups whereas before the tuneup it would have required like 2 and a half.

Is it me, or does every basic engine mod increase efficiency while it increases hp? i noticed a huge difference with my CAI, and now the pulley seems to have had the same effect. Bonus

aznboi2424

iTrader: (10)

UR crank pulley increases MPGs? if so then i may look into picking one up at the 105k mark when i do the timing belt. might as well since your working the crank pulley right? how much better with the crank pulley?

underst8

Not sure since I also got plugs and oil at the same time - but it makes sense that you would see MPG improvements due to the pulley being lighter = engine doesn't have to work as hard.

fsttyms1

Waaaa I do that in half a week. I loose money putting in 87 over 91+

Yea but what hes loosing from the reduction is more than that. I know i loose more than i save trying. Same goes for fuels with ethanol in them. We still get them here and it has a reduction in mileage as well.

Those complaining need to just SUCK IT UP and quit complaining. We still have it better than alot and its only going to get worse.

Just made the trip from Appleton to Grand Rapids Mn on 1 tank (about 420 miles) at 80 still had 1/4 tank left.

heyitsvu

iTrader: (1)

Wow. i hope my mileage goes up with the 6mt tranny, intake, pulley, and headers that are going on my car. its funny when you do mass modding. you never know what really gave you the gain in power/mpg, you just know they all contributed somehow.

fsttyms1

My mileage was better on the HWY before the swap

AcuredCLS

i do alot of city driving everything is super close, but not close enough to walk unfourtanetly..so i dunt think my car has ever seen hwy mpg its liek permanetly set in city..im getting about 15-18 maxxx mpg, which sucks..i was actaully going to get a civic, but get a load of this an 04 civic cost more to insure than my 01 CLS?? hahah does anyone get that because even the insurance lady was confused...and i have no accidents or tickets i am clean as they come...KNOCK ON WOOD...talk about retartedd..well im goin to stony brook next year which and im commuting so it will be seeing some hwy mpg hopefully soon...

coastal rider

Assuming that we're talking about the S-type, high compression means need for higher octane fuel to prevent pre-detonation, leading to holes in your pistons. I believe our engine mgmt electronics backs-off the spark timing to compensate. I have mixed 87 & 91 at times but pinging does occur.

bhurlbut

I just tried to fill up with 91 at a Shell station and no pumps had premium! WTF! So I atleast got 89. I also noticed new stickers on all pumps claiming "at least 10% ethanol"