Does LX Really Have 2 More HP?

[SWUtah]

The internet is amazing. Sparing over gas octane level and per gallon pricing on a $90K vehicle. Freaking 1st world problems. I would imagine when 87 went from $2.25 per gallon to $2.75 a gallon you stopped driving as much?

I guess part of it is when the price difference gets to 90 cents per gallon. Now your looking at for some owners an additional $100 per month so in say 10 years of driving 140k miles you have a $12k price difference. Seem with these #’s this is a worthwhile discussion?

 

[TeCKis300]

Shell premium is 94 octane so every other fill up 87 octane average would be 90 1/2 which would qualify as premium

Alternating would probably be the worst strategy. If u want to run lower octane, stick with it. Reason is that when u run the good stuff, the engine will be running on full timing maps with little timing compensation. Throw in low octane, and the initial incidence of knock may be more severe, until the timing compensation comes in. Then when you throw in the good stuff, it will take a bit before it takes full advantage of the good stuff again. Rinse and repeat.

Versus running a single, albiet lower octane, the compensations are already in place with retarded timing. It'll keep probing for the good stuff by incrementally advancing timing until low level knock, at which time it'll back off again. So the knocks will be less severe.

 

[TeCKis300]

I guess part of it is when the price difference gets to 90 cents per gallon. Now your looking at for some owners an additional $100 per month so in say 10 years of driving 140k miles you have a $12k price difference. Seem with these #’s this is a worthwhile discussion?

The money is not fully down the drain. Higher octane does bring incrementally more efficiency, i.e. range.

With the normal diff in price between regular and premium, it generally is a wash in value. So we pay a bit more, but travel a bit farther, while making a bit more power.

But your right that the current gap in prices changes that. So not 12k down the drain but perhaps 4k.

But if u wanted cheap transportation, this is surely not it, regardless of premium. 1st world problems.

 

[SWUtah]

Alternating would probably be the worst strategy. If u want to run lower octane, stick with it. Reason is that when u run the good stuff, the engine will be running on full timing maps with little timing compensation. Throw in low octane, and the initial incidence of knock may be more severe, until the timing compensation comes in. Then when you throw in the good stuff, it will take a bit before it takes full advantage of the good stuff again. Rinse and repeat.

Versus running a single, albiet lower octane, the compensations are already in place with retarded timing. It'll keep probing for the good stuff by incrementally advancing timing until low level knock, at which time it'll back off again. So the knocks will be less severe.

I see your point but I keep my tank full so at 100 miles I’ve only used 6-7 gallons of fuel so with a 20 gallon tank every 100 miles I would be adding 6-7 gallons of either premium or regular to the mix. This should keep the average at 90 octane or am I still not understanding something?

 

[TeCKis300]

I see your point but I keep my tank full so at 100 miles I’ve only used 6-7 gallons of fuel so with a 20 gallon tank every 100 miles I would be adding 6-7 gallons of either premium or regular to the mix. This should keep the average at 90 octane or am I still not understanding something?

That would work much better. The octane swings wouldn't be as drastic which is the concern.

 

[SWUtah]

That would work much better. The octane swings wouldn't be as drastic which is the concern.

Thought it would but I will probably just stay with premium since money’s not my problem I just hate to get screwed by the oil companies with this big of a price differential between regular and premium. With my memory I would get screwed up on the rotation to much stress to keep everything straight. Plus I can’t abuse the Beast.