Mid-grade is more of a toss-up. Knock sensors fail.. It has to happen over X period of time for a knock sensor to retard timing. I've rebuilt a pre-vortec that had spun the front main bearing and snapped a rod. Engine had knock sensors and still would rev past 4k rpm So they aren't completely reliable.
If a knock sensor fails, it will throw codes and set the CEL. At least on BMWs. I'm afraid you're misinformed on the water content. Each state is different, after living in Oregon is when I learned this. It's one of the few states that allow a much higher level than others. You're talking about water picked up by transport especially by ethanol in the gas or condensation. Entirely different thing.
Ok in technical terms it's a level of acceptable contamination which is quite a bit more acceptable here than it is in the EU. Do you work for an OIL company? What's that? BTW, I don't put petrol or gasoline in my tank - I've got an oil-burning d. The oil industry sucks - they'll do anything and everything to make a profit. Including cutting all the corners they can. You hear people saying it's a lease, they'd rather save the money, etc. I'm just surprised to see it on an enthusiast forum.
Originally Posted by umizoomi. As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times. Dmorenonj 0. Originally Posted by DarkStarBimmer. Define best. It's not synonymous with most expensive, or highest octane. Stock BMW four bangers just don't have high enough compression ratios or boost pressures or sufficiently advanced timing to gain any benefit from higher than 89 octane unless driven in track situations.
You don't think a BMW four banger can spin bearings or throw rods? I cant remember a day when I put anything else below I don't understand people willing to pay a premium price for something based on nothing more than advertising claims.
Never forget that truth in advertising is an oxymoron. When I see proof from 3rd party testing that contradicts my own testing results I'll consider paying more, after I conduct my own tests again. Until then I'll pocket the difference. I am in the camp that runs the octane rated gas that BMW recommends for my particular car. I use 91 and 94 Chevron exclusively. This topic keeps coming up about every 2 months or so, and there are always those who run lesser octane rated gas than is recommended.
And I always wonder why you own a vehicle with recommended 91, then run 89 or even I just don't get it I have to believe that BMW recommends 91 for a reason All times are GMT The time now is AM. Mark Forums Read.
Page 1 of 3. Thread Tools. Appreciate 0 Tweet. Find More Posts by F30guy. Naturally then, the Ford hauls ass as effortlessly as it hauls a half-ton of manure. When fed 93 octane, this pound, self-propelled wheelbarrow will crash 60 mph in 5.
Power at the wheels dropped from to horsepower with the change from 93 to 87 octane. That difference seemed to grow, and we could even feel it from the driver's seat at the test track. Compared with premium fuel, regular feed sapped the F's urgency both leaving the line and in the meat of the tach sweep.
The rush to 60 mph softened to a still-blistering 5. Tapped into the Ford's CAN bus, we recorded a peak boost pressure roughly 1. The high-octane gas also helped when soft-pedaling the accelerator, elevating mph fuel economy from That won't make a financial case for running 93 octane, but then you didn't buy the expensive engine as a rational choice.
You can think of this EcoBoost engine's more aggressive high-octane tune as a sort-of sport mode that can be switched on or off with every fill of its We always assumed that mid-grade fuel existed chiefly to bilk a few more dimes from the type of people who ask the dealer to undercoat their car. Turns out it's also for owners of Fiat Chrysler's Hemi 5. With no mention of that on the fuel-filler door, though, a driver would have to read the manual to know. With just miles on the odometer and looking as if it had already been hand washed with grit sandpaper a half-dozen times, this Charger is unlikely to ever taste 93 octane again.
Oh well. The Charger's manual says 87 octane will provide "satisfactory fuel economy and performance. Similar to the BMW, the Dodge's gains on the dyno 14 horsepower and 23 lb-ft of torque translated into negligible improvement in our real-world acceleration testing. Saddled with elephantine heft and eager to spin its rear all-season tires at launch, the Charger posted the same 4. At triple-digit speeds, the higher power on 93 octane gave the Charger an advantage measured in tenths of a second.
The Dodge also posted a 0. Just as important, the bellicose roar of the iron-block Hemi and the Charger's ability to reduce its rear tires to jungle-gym ground cover are unaffected by the fuel in the tank. I was wondering if that will really affect anything. And do i need to run Please let me know???
Appreciate 0. Brigadier General. I think it is highly recommended that the car be fed a steady diet of 91 or greater octane. However, it will adjust it's timing for lower octane if an emergency dictates it.
Originally Posted by Gordon Murray. Being a fan of Honda engines, I requested that they consider building for the F1 a 4.
And Oh: You should be warned that this may adversely affect both performance and economy, invalidating the case for doing such a thing in the first place. Major General. This has been discussed a million times before. You won't hurt anything by using 89 but you may get less fuel efficiency and less performance.
Originally Posted by NiVeDh. Why did use 89 in the first place? Lieutenant General. Originally Posted by persian I wonder if the previous owner had been using 89 or lower octane for my car.
I just bought this off a non-BMW dealer and felt the car was a little slow accelerating from a dead stop.
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