Regular Plus vs Premium Fuel - Which is really less expensive?

15 messages, Last post on Jul 15, 2008 at 6:01 PM

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#14 of 15 Re: Gas Mileage! [mnfjhunter] by tnbluefj Jul 03, 2008 (11:24 am)
Replying to: mnfjhunter (Jun 13, 2008 10:53 am) Hello, New to this forum. Just wanted to say I have an '07 FJ, bought in Feb of '07 - I now have almost 25,000 miles. Own a home in TN and in FL so do a lot of Interstate driving. I only use REGULAR fuel and always get over 20 mpg hwy. I just returned to FL from 3 weeks in TN and my best mpg was 24.77. My average with 5 tanks was 22.28. I keep my tires aired up, air filter is a K&N, no luggage rack, no other mods. I usually drive the posted speed. On I-75 will drive 72-73 mph., over that and mpg will drop considerably. I do not quickly take off from stops and try to be careful with accelerating into traffic. I have tried several tanks of premium and noticed no difference in my mpg. So I know you can get decent mileage per tank, but you just have to pay attention to your driving habits. And if it makes any difference, I am a 52 yr old female. Replies to this message: sparklemahn (Jul 15, 2008 6:01 pm)
#15 of 15 Re: Gas Mileage! [tnbluefj] by sparklemahn Jul 15, 2008 (6:01 pm)
Replying to: tnbluefj (Jul 03, 2008 11:24 am) Just picked up a brand new 2008 FJ 6 speed stick. The extended owners manual specified 91 octane gas. Mobil has 93 and 89, so if I fill up with the same amount of fuel but switch off between 89 and 93 octane, I will average 91 octane. If the manufacturer calls for 91, you should use 91! Do not complain later if you have engine trouble, ok?

#14 of 15: Re: Gas Mileage! [mnfjhunter] by tnbluefj; Jul 03, 2008 (11:24 am)

Replying to: mnfjhunter (Jun 13, 2008 10:53 am)

Hello,
New to this forum. Just wanted to say I have an '07 FJ, bought in Feb of '07 - I now have almost 25,000 miles. Own a home in TN and in FL so do a lot of Interstate driving. I only use REGULAR fuel and always get over 20 mpg hwy. I just returned to FL from 3 weeks in TN and my best mpg was 24.77. My average with 5 tanks was 22.28. I keep my tires aired up, air filter is a K&N, no luggage rack, no other mods. I usually drive the posted speed. On I-75 will drive 72-73 mph., over that and mpg will drop considerably. I do not quickly take off from stops and try to be careful with accelerating into traffic. I have tried several tanks of premium and noticed no difference in my mpg. So I know you can get decent mileage per tank, but you just have to pay attention to your driving habits. And if it makes any difference, I am a 52 yr old female.

sparklemahn (Jul 15, 2008 6:01 pm)

#15 of 15: Re: Gas Mileage! [tnbluefj] by sparklemahn; Jul 15, 2008 (6:01 pm)

Replying to: tnbluefj (Jul 03, 2008 11:24 am)

Just picked up a brand new 2008 FJ 6 speed stick. The extended owners manual specified 91 octane gas. Mobil has 93 and 89, so if I fill up with the same amount of fuel but switch off between 89 and 93 octane, I will average 91 octane. If the manufacturer calls for 91, you should use 91! Do not complain later if you have engine trouble, ok?