87,89, or 91 octane?
- Thread starter taco John
- Start date
silverpataco
Well-Known Member
I'm driving 1200 to 2000 miles per week in my 16. Gas with 87 is sluggish on take off with no power button activated. 91 or 93 makes the truck feel like the power ECT button is on. Only seeing 2-3 mpg better on the highway. Not enough for 35-65 cents per gallon more.
Friskelm
Active Member
I have been switching up between 87 and 91 octane and I really can't see any difference. I have also been checking the accuracy of the computed mileage and I find it witching 1/10th mpg of my calculator
Now, 1.5 years and 40,000 miles later, I am finding my truck computer about 4 to 5 miles off of manual calculations. I just put taller tires on my 16 TRD Sport and it is a lot more doggy, I will try 91 octane again and see what I notice.
Now, 1.5 years and 40,000 miles later, I am finding my truck computer about 4 to 5 miles off of manual calculations. I just put taller tires on my 16 TRD Sport and it is a lot more doggy, I will try 91 octane again and see what I notice.
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taco John
Well-Known Member
Hmm really? well in my taco I see a difference, even though it's very minor. What I notice is slightly better mpg, more power around 3-4 rpm, and overall it's less sluggish going from 0-60. But the thing I've noticed the most is the noise from the motor is much much quieter. When I use 87 I notice a ping sound, but when I fill it up with 91 she sounds much better. Just my experience with my 08 (4.0l)
slowpoke
Well-Known Member
Whats ur altitude?
taco John
Well-Known Member
Ocean level lol all I know. I live in San Diego close to the coast.
slowpoke
Well-Known Member
U shouldnt have to run premium to avoid pinging imho.
Ive always ran premium but that was user preference, and now required with the blower. Im at sea level and up to 1000ft on avg.
Are you leaving the trans in a high gear while going up a grade?
taco John
Well-Known Member
To be honest I just premium because it makes me feel better haha.
Geoff Taylor
New Member
Yes, its true. If you put higher octane for some reason, you get less possible ping, more perk, and better milage. Been there done that. Used regular gas which is 87 here and doesnt last as long. Put supreme in, which is 93, and much better. The official reports say no difference, but there is. If there wasnt, why would you have the options at the pumps? Higher octane is better burn and cleaner, but there is no harm in using regular 87. I have a brand new 2018 Tacoma Sport 4x4 which I chose over the TRD Off Road, only because it had betteroptions including sunroof, colors, etc. I had to order it as manual wasn't available so it had to be built. 3 months wait for delivery, and great truck. 6 speed manual, Inferno Orange, BF Goodrich KO2 tires (Not the junk ones that come standard with TRD Pro) plus TRD Air Intake, and TRD catback exhaust. and only 2km on OD. Factory to delivery truck I bet. Much much better looking than the TRD pro look wise, and with all black leather and interior and a little inferno trim inside. Special order, but cannot complain. You never have to buy what they have on the lot, you can always custom order from your Toyota dealer, at least here you can.
Friskelm
Active Member
Make sure you manually check your mileage. I see a 4 to 5 mpg difference between the computed value versus the value the truck tells me.
The truck computer seems to be biased about 5 mpg high.
I just put BF Goodrich 31s on my 16 TRD Sport and lost another 3 mpg or more. I went from 21/22 to 18 mpg. The truck still reports 23 and it reported 25/26 and as much as 29 with the stock tires.
BTW, 31s are 3% faster and farther than the speedo/odo readings
The truck computer seems to be biased about 5 mpg high.
I just put BF Goodrich 31s on my 16 TRD Sport and lost another 3 mpg or more. I went from 21/22 to 18 mpg. The truck still reports 23 and it reported 25/26 and as much as 29 with the stock tires.
BTW, 31s are 3% faster and farther than the speedo/odo readings
OR17TRD
Well-Known Member
I have 285/75 (32.8x11.2”) on. My computer says 13-14mpg. Doing the hard math it’s about the same. It might be because the trucks had these on since new. The computer knows no difference.
Friskelm
Active Member
I was mainly speaking of the calculations with the factory tires. I have only had the 265 75R17s for 500 miles. They replaced the factory 265 65R17s. My fuel information from the "gadgets" hasen't really jived with calculator math for quite a while. The new tires are only 3% off so I really don't see any reason to reprogram my truck.
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OR17TRD
Well-Known Member
No need to. It’s a couple mph difference at 65mph.
As far as your truck saying you got 29mpg that’s on a single trip right? When you turn the truck off it says distance driven and mpg.
Like this:
Those are for single trips and is not what the combined mpg for the tank is. I’ve had that display say as low as 4mpg and as high as 28mpg with my 285/75’s.
The display that keeps track of mpg for the tank has always been very close to the hard math calculations for mpg for the tank.
This display:
Yeah. The tank average is usually pretty accurate from what I’ve seen with mine. I have stock tires and no lift.
Also, I get about what the EPA ratings are, usually even a little better and I live in the mountains.
Friskelm
Active Member
I get trip, also tank average and a running average until reset.
The 29mpg was a hi way trip of about 200 miles, non-stop and reasonably level grade.
OR17TRD
Well-Known Member
taters95yj
Active Member
I work for a well known fuel retailer, there is no midgrade tanks, it just blends the 87 and 91 to give you your midgrade. At least thats the way ours work.