Gas millage
#21
RE: Gas millage
ORIGINAL: fortywillys
you don't need to run 91+ unless your subjecting your running your engine hard so ya don't fry the piston's.
you don't need to run 91+ unless your subjecting your running your engine hard so ya don't fry the piston's.
I know what you are saying here, but I don't know if I agree with your statement completely. I would tend to think, seeing that I know what engineers have to go through and deal with (since I just got my degree in Mech. Eng.) I think when they suggest to put premium in the car, I am pretty sure it will be safe to do it. I would have to think that they took into consideration the higher temperatures created by burning premium fuel and designed the combustion chamber and pistons accordingly... granted, I do not work for these guys, nor can I 100% say this is the case... I just know the crap I have to deal with as an engineer
#22
RE: Gas millage
Using lower octane won't damage the engine because the comptuer adjusts timing to prevent detonation (knocking, which is what the higher octane content prevents)- the engine has a knock sensor, when you use the lower octane it will sense the detonation and adjust accordingly- this will rob the engine of power and efficiency and while it won't hurt in small doses, the long term effects are certainly negative.
#23
#24
RE: Gas millage
Actually its not 22 to 30...its 22 for "intown" driving and 30 for highway..They are just averages that the dodge has come up with. I took a 300 mile both ways trip (600+ miles) and I averaged it out with my dad and it came out to 29.5 miles a gallon. Not too far off the 30 and I was downshifting and changing lanes alot hehe...It happens when your driving a new car let alone a srt-4 hehe..The 22 that will vary for sure depending on how much you race around town..mines probably just under 20 hehe... I live in south florida so its 87, 89, and 93..Not too many places with 91 around here...Just a lil info if it helps anyone..peace
#25
RE: Gas millage
The owners manual even says that using lower than 91 octane is completely fine and OK to do, but that you will experience severely reduced performance as well. Mine only averaged 21.9 MPG with an even mix of driving, it should be around 26 MPG for an even mix of driving. Then again, I do love to hear my Mopar BOV.........often.[sm=smiley17.gif][sm=smiley2.gif][sm=smiley36.gif]
#26
#28