What mileage you getting with temps under 30 degrees ?

[CtrlAltDefeat]

I'm curious what octane you guys are using... I've been putting premium in mine, because the difference in a 10 gallon tank is only about $2-$3 extra per fill up and in our yari, that's not that often... Seems to have better pickup and mileage. What do you guys think?

[BailOut]

Originally Posted by CtrlAltDefeat

I'm curious what octane you guys are using... I've been putting premium in mine, because the difference in a 10 gallon tank is only about $2-$3 extra per fill up and in our yari, that's not that often... Seems to have better pickup and mileage. What do you guys think?

That is a topic that has been hashed out thoroughly but the data was lost in the hack. The findings were consistent, though:

If you drive it like you stole it you will see a slight increase in MPG with higher octane fuel but if you drive lighter or are a hypermiler you will see a large decrease in MPG with higher octane fuel.

[jambo101]

In full summer set up i was getting close to 800 kilometers per tank,now with winter tires,and winter formulated gas and only city driving i'm lucky to get 400kms,as for using higher octane gas in a car meant for regular gas?an absurd waste of money.

[marcus]

Originally Posted by jambo101

In full summer set up i was getting close to 800 kilometers per tank,now with winter tires,and winter formulated gas and only city driving i'm lucky to get 400kms,as for using higher octane gas in a car meant for regular gas?an absurd waste of money.

ok i dont get how ur losing half of ur mpg... i guess im not doing too bad with 500km on a 36 liters./ 7 bars this winter 60/40 cty/hwy.

[jambo101]

I might be able to get it up to 500kms but that would be getting into the flashing last bar for sure.

[1stToyota]

Originally Posted by CtrlAltDefeat

I'm curious what octane you guys are using... I've been putting premium in mine, because the difference in a 10 gallon tank is only about $2-$3 extra per fill up and in our yari, that's not that often... Seems to have better pickup and mileage. What do you guys think?

Don't use premium unless the vehicle's computer was tuned to run *Premium fuel only* at the factory.

[kou]

Originally Posted by 1stToyota

Don't use premium unless the vehicle's computer was tuned to run *Premium fuel only* at the factory.

your computer will adjust the timing as close to pre dentanation as it can with the fuel you have in the car.test have proven the fact that any car will produce less power with regular than with premium.

[50MPGDream]

Originally Posted by kou

test have proven the fact that any car will produce less power with regular than with premium.

who did this "test"? I'd be interested in seeing it

[CtrlAltDefeat]

Yea, me too... My informal tests (I.E. how it feels to drive and mileage per tank) seem to show better power and mpg...

[1stToyota]

Originally Posted by kou

your computer will adjust the timing as close to pre dentanation as it can with the fuel you have in the car.test have proven the fact that any car will produce less power with regular than with premium.

It's a proven fact that Ford TSB's had to be released because they figured out that long cranking times during startup was because owners used premium in cars designed to burn 87 octane. Talking about effecency, not power.

[kou]

Originally Posted by 1stToyota

It's a proven fact that Ford TSB's had to be released because they figured out that long cranking times during startup was because owners used premium in cars designed to burn 87 octane. Talking about effecency, not power.

what does ford have to do with anything.

[kou]

if you have upgraded your car with performance parts and drive like you stole you will get pinging at higher rpm's and full throttle with 87 octane.if you drive like a grandma and your car does'nt get past 3500rpms use 87 octane all you want.toyota recommend 87 octane yes, but with a high compression motor and high rpms i would not use it. even the smart car recommends premium knowing you will get pinging with regular.

[BLAZINBLUEVITZ]

Originally Posted by 1stToyota

Don't use premium unless the vehicle's computer was tuned to run *Premium fuel only* at the factory.

first time i heard that one......

Originally Posted by kou

if you have upgraded your car with performance parts and drive like you stole you will get pinging at higher rpm's and full throttle with 87 octane.if you drive like a grandma and your car does'nt get past 3500rpms use 87 octane all you want.toyota recommend 87 octane yes, but with a high compression motor and high rpms i would not use it.

so what happens when using premium fuel and you drive it like you stole it......

[1stToyota]

Originally Posted by kou

if you have upgraded your car with performance parts and drive like you stole you will get pinging at higher rpm's and full throttle with 87 octane.if you drive like a grandma and your car does'nt get past 3500rpms use 87 octane all you want.toyota recommend 87 octane yes, but with a high compression motor and high rpms i would not use it.

A modded car and a stock setup are different.

[1stToyota]

Originally Posted by kou

what does ford have to do with anything.

Yeah, I forgot that Ford builds cars that have ignition systems, internal combustion motors, A/F ratios, burntimes, etc, that are exactly opposite of how every other automaker builds their cars now.