I own a ‘97 mercedes benz and i was wondering what would happen if i switched to regular instead of premium?
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I own a 1997 Mercedes benz, and it cost a lot of money in gas cause it requires premium. Can i switch to regular, and will the car still be fine… what are the draw backs?
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Questions February 6th 2010
February 9th, 2010 at 6:51 am
aslong as regular is about 95 octane it should be fine as the car will alter its timing to accept the lower octane - just make sure to give it a proper hard run every so often to blow the engine out (and i dont mean blow it up itll be fine)
February 9th, 2010 at 5:52 pm
If there is no detonation or pinging when a lower grade of fuel is used, then do so, unless the owners manual advises against the use of 87 or 89 octane fuel
February 10th, 2010 at 12:52 pm
You’d save a lot of money. Your car? Nothing.
Many high end automobiles have engine management computers that are able to take advantage of the higher octane of mid and premium grades of gasoline …they do things like tweak the timing and adjust fuel delivery and whatever else depending on the sophistication of the engine (stuff like variable valve timing, etc.).
One aspect of marketing a car obviously has to do with engine performance and power; the maker “sells” the engine by claiming the highest level of HP it’s capable of ..which of course only occurs when running premium fuel. To be legal in it’s claims, the maker requires the owner to use only premium.
If you use regular, the engine management computer will dial back all those “tweaks” it made running premium and the engine will run just fine although at a slightly reduced HP output. Will you notice this? Probably not. As far as keeping your engine fuel injectors clean …as long as you are using a name brand or top tier rated gasoline it doesn’t matter what grade you use, they will *all* keep you engine’s insides squeaky clean.
February 13th, 2010 at 11:20 am
there is a reason why the engineers of mb said to use premium fuel, and that is because your engine is designed to use premium fuel. high compression engines are designed to run with premium fuel. in the long run you are doing more bad than good. not to mentioned that your gas mileage will be worse with regular fuel than it will be with premium, so it might end up being more expensive to use regular than premium.
also if mb police saw you putting regular gas in your car they will take the car away and smack you.
February 15th, 2010 at 1:52 am
All modern Benz gasoline engines have knock sensors which detect knocking or pinging from the use of low quality or low octane fuels. What this does is retards the spark plug firing which in turn does a 2 things: 1) lowers engine output and 2) increases fuel mileage (thereby erasing some of those pennies you saved buying the lower octane fuel). The owner’s manual will state that in the event that you cannot find a suitable octane fuel, lower octane fuel can be used by Benz advises pushing the engine hard (usually only about halfway up to redline). It usually also recommends filling up with premium as soon as you can find it again to increase the octane level of the fuel in the tank.
In the long-term, prolonged use of lower octane fuel can cause engine damage. I recommend just sticking with premium fuel. Paying a few cents more for premium fuel can save you money down the road.
February 18th, 2010 at 5:49 am
Based on the year model of your car, you probably have over 120K miles on the odometer. Depending on the kind of maintenance you had, those poorly maintained may not notice much the difference of burning regular where the driver would experience rough idling, high vibration and less power density. Ideally, premium gas when burned in a well maintained ‘97 MB would deliver a smoother ride, a cleaner exhaust and less vibration. Just stick with the premium gas recommended for your car. In most areas, the difference bet. reg and premium is about 20 to 30 cents per gallon. It is a small price to pay for a cleaner engine with less deposits and carbon buildup in the crankcase, oil ducts, valves and pistons/rings.
February 21st, 2010 at 9:57 am
Keep the gas in the car it was designed for. The engine management computer retards the timing when inferior grades of fuel are used. This increases the emissions output, reduces power and the unburned particulates will eventually damage the catalyst and prematurely fouls the plugs. As a seasoned Mercedes owner and having cars with more that 300k miles on them, I say if you don’t want to follow the manufacturers recommendations on a Benz, sell it and get a KIA or some other throw away car..