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Yes, because the electronics detect the spark knock and retard the timing. The engine that specifies 91+ should get that. It’s not a suggestion. The ones that imply a particular octane for “best performance” but in the next breath state that another lower octane level is permitted and acceptable should use the lower number for the baseline.
It’s all I use in motorcycle and power equipment.
New vehicles do not make a noticeable knock. The computer changes the timing. So you will never notice it. I run 89 in mine. The manual says 89. But 87 is ok but for perfect engine performance 89 is the way to go
That's why our regular gas is only 85.
Liters per 100km, CAD vs USD, price per liter...it's too much work for me to try and convert all that to 'merican.
You got that half right. I would use 89 if I ever towed or hauled anything of any significance. It states right in the manual, for best performance use 89 octane. But can you provide any data which shows that using 87 is going to shorten the life of these trucks?
I will search for it, but I have seen the piston torch from running 87 while pushing the engine. So maybe it will not matter but the cost difference between 87 and 89 is minimal vs engine work.Liters per 100km, CAD vs USD, price per liter...it's too much work for me to try and convert all that to 'merican.
You got that half right. I would use 89 if I ever towed or hauled anything of any significance. It states right in the manual, for best performance use 89 octane. But can you provide any data which shows that using 87 is going to shorten the life of these trucks?
About $6.75 USD per US gallon at the current exchange. Touch over 22 mpg running 91. $6.05 USD per US gallon for regular About 20.25 MPG running 87. Now which is cheaper? I haven't done the math yet, but it's pretty close in price per mile. Okay I worked it out and it's within .5 cents per mile. Between .3 and .305 US cents per mile either way based on pump price my last fill up. I may try mid grade 89 next and see if that puts the timing back in it and matches the premium mileage. Then mid would be cheapest per mile.Liters per 100km, CAD vs USD, price per liter...it's too much work for me to try and convert all that to 'merican.
As already mentioned, I would use 89 octane if I was pushing my engine. I wasn't disputing that part of what you posted. What I was disputing is your implied claim that using 87 octane may decrease the longevity of our trucks. Which may or may not be true if pushing your engine. But I certainly don't believe that's true for "normal" unloaded driving (commuting).
That is why i said underload and logevity.
I run 89, have in every Hemi I have had. Just "seems" to run better. BUT I always buy 89 Octane, also when I fill cans because all my Stihl stuff 89 is the grade to use, and I have to run 89 in my MC also, 87 just does not do it on a 1833 CC (6 cylinder flat motor) engine from 2006. Again, just my experiences. FWIW, I always run top Tier gasoline, I stay away from Mom and Pop etc.,. So this is my thoughts, IMHO ..... But I's a Boird Also.
YUP, my 2008 HD Ultra Classic was Premium also. The Honda actually states 87, but that be on a straight under 900 lb bike. U add a 1200 lb Trike Kit, plus me, U talking 2300-2400 lbs, needs the lil bit more Octane. It is a 2006, not have the advanced spark timing etc newer beasts have.
