Premium fuel really needed?
01-26-18, 10:52 AM
#166
Lexus Champion
01-26-18, 11:39 AM
#167
I had 2 bad experiences with regular gas on 2 turbo charged engines. In both cases, engine vibrations and hesitations were experienced. Since then, I started taking the recommendation for running premium seriously.
01-26-18, 12:56 PM
#168
And here is the crux of the problem. All we have is anecdotal evidence, which is no evidence. Until I see results which are repeatable and repeated by others, conducted in a controlled environment, e.g. on a dyno, then I'll follow the information in the owners manual for whatever vehicle I'm driving.
Last edited by 2008GS; 01-26-18 at 01:02 PM.
01-26-18, 01:20 PM
#169
Lexus Champion
We could be thinking about this backwards question could be why isn’t Land Cruiser and Toyota recommending 91 or requiring 91 octane in the Land Cruiser 5.7 is it because the vehicles it competes with burn 87 octane and Toyota knows that they can get a couple hundred thousand miles out of that engine even with damage long term from using to low of octane?
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2008GS (01-26-18)
01-26-18, 01:58 PM
#170
I would not run regular in a turbo engine, even a stock one. I keep at least 108 Motor Octane in my Supra, and often 112 -116. Then again, I typically run 30-35 PSI boost, so the effective compression ratio is very high, and there's a lot of thermal load on the engine under maximum output.
Last edited by I6turbo; 01-26-18 at 02:02 PM.
01-26-18, 06:03 PM
#171
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Max707 (01-26-18)
01-27-18, 08:59 AM
#172
Pole Position
Sorry, still anecdotal. Where are the facts, supported by scientific testing. Just one example, "Don't think this will void your warranty." Someone show me a test done on a dyno about how much horsepower is or is not produced and what the fuel consumption is. Then I'll begin to believe the car companies are wrong. Need so life of the car testing also. The impact may be small. Then a statistical analysis of the data so others can repeat the experiments. Otherwise it is all just internet gossip.
01-27-18, 09:34 AM
#173
Lexus Champion
Perpetual argument. Just every one do whatever one wants with one's own vehicle. gasoline, oil, tires,etc., etc. Let's move on to some other
meaningful issues. For me always I fill with Shell premium to keep my car's engine clean having DI engine. No comment please.
meaningful issues. For me always I fill with Shell premium to keep my car's engine clean having DI engine. No comment please.
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Max707 (01-27-18)
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REDHORSE (01-28-18)
02-01-18, 06:25 PM
#175
Based on availability at the times I need to re-fuel, I have run all grades of gasoline. I just do not subjectively feel any difference, even when towing my horses.
What objectively makes a difference is when running ethanol-free gasoline. With it I get 3+ miles more per gallon, based on the display screen. What is really nice is that increased MPG with ethanol-free for me translates into around 60 more miles of range.
About 300 miles range with ethanol bend vs 360 with ethanol-free..
What objectively makes a difference is when running ethanol-free gasoline. With it I get 3+ miles more per gallon, based on the display screen. What is really nice is that increased MPG with ethanol-free for me translates into around 60 more miles of range.
About 300 miles range with ethanol bend vs 360 with ethanol-free..
02-01-18, 10:27 PM
#176
Pole Position
Based on availability at the times I need to re-fuel, I have run all grades of gasoline. I just do not subjectively feel any difference, even when towing my horses.
What objectively makes a difference is when running ethanol-free gasoline. With it I get 3+ miles more per gallon, based on the display screen. What is really nice is that increased MPG with ethanol-free for me translates into around 60 more miles of range.
About 300 miles range with ethanol bend vs 360 with ethanol-free..
What objectively makes a difference is when running ethanol-free gasoline. With it I get 3+ miles more per gallon, based on the display screen. What is really nice is that increased MPG with ethanol-free for me translates into around 60 more miles of range.
About 300 miles range with ethanol bend vs 360 with ethanol-free..
I've towed a 3-horse Charmac with a 17 hand hunter and a 15 hand appendix. No issues whatsoever, but I definitely wife's 3/4 ton Dodge with Cummins.
02-02-18, 05:04 AM
#177
The engine ECU adjusts for whatever gasoline you use. I run 91 octane Sinclair ethanol-free...definitely kinder to the rubber in the fuel system
I've towed a 3-horse Charmac with a 17 hand hunter and a 15 hand appendix. No issues whatsoever, but I definitely wife's 3/4 ton Dodge with Cummins.
I've towed a 3-horse Charmac with a 17 hand hunter and a 15 hand appendix. No issues whatsoever, but I definitely wife's 3/4 ton Dodge with Cummins.
02-02-18, 01:30 PM
#178
The amount of heat energy in gasoline as compared to ethanol on a volume to volume bases is well documented and supported with facts. Having said that, my turbo charged Audi S8 does not achieve the 3mpg increase I see with my normally aspirated vehicles.
08-07-19, 10:03 PM
#179
Lexus Champion
I see zero reason LX needs premium fuel.
Sorry if this has been covered before, and I did do a search.
I'm looking for one of these and know the gas mileage is bad.
Its V8 is identical to the Tundra's 5.7 which calls for regular. There are zero differences; the compression ratios are identical.
I don't mind driving a gas guzzler but I really don't want to waste $12-15 bucks a tank on high octane fuel if I don't need to.
Does anyone here run regular? I wonder what the service techs at the dealer would tell me. Or the Toyota dealer.
I'm looking for one of these and know the gas mileage is bad.
Its V8 is identical to the Tundra's 5.7 which calls for regular. There are zero differences; the compression ratios are identical.
I don't mind driving a gas guzzler but I really don't want to waste $12-15 bucks a tank on high octane fuel if I don't need to.
Does anyone here run regular? I wonder what the service techs at the dealer would tell me. Or the Toyota dealer.
