VJ RC51

why i always got 20-23mpg when everyone else always gets 18. I ran nothing but 87 octane.

MongooseGA

iTrader: (6)

To save gas in my SC400, I leave the car in park

Works better than a K&N.

SUPRMSC

iTrader: (7)

Contrary to popular belief, you get more miles by buying less higher octane fuel then having more of a lower octane fuel. Gas milage increases when you use higher octane as it burns more efficiently.

So no, your theory with the 87 isnt true.

VJ RC51

ok back to the drawing board

Koma

iTrader: (3)

Honestly I wouldn't be using anything less than premium because the engine management wasn't built to use low octane. You'll get misfires and pretty much all around crappy car excitement.

ki_soarer

i was getting about 16 in the city stock. after deleting my egr, and keeping a very close eye on tire pressures, i get about 18-19 now, and i drive a lot harder than i used to. i have had to put 89 in it because a gas station was out once, and i was on E. i think i got about 15-16 mpg that tank.

Psionic

I thought that higher octane just detonated slower so that you could run advanced ignition timing without pinging? I was under the impression that if you wanted to run lower octane, just retard the timing. (I also heard that the SC's will do this automatically for you).

I run nothing but 87 at nothing less than 80mph, and I always get 21mpg. City is usually 19ish.

indo79

iTrader: (1)

I thought my car was out of sync when it turned up 16-18mpg in Chicago city driving/snow driving since I did compare it to my previous car, a 2000 V6 Accord that gave me 34mpg on the freeway/24 in city. (I was very surprised with the V6, Michigan City, IN to Ann Arbor, MI 200 miles exactly on 6 gallons of regular 87 octane gas)

As the temperature starts to warm up, I am getting 19-21mpg regularly, and always using 93 octane.