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Buduwoodoo
Mentor
Joined: 16 Nov 2006
Posts: 4600
Location: Tacoma,Washington |
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 Can I put regular gas in my 1998 mercedes s 420? |
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| Mon Sep 17, 2007 6:32 pm |
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shteff
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Joined: 23 Sep 2006
Posts: 4592
Location: Calgary, AB. |
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| Can I put regular gas in my 1998 mercedes s 420? |
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No I would not propose it.you may damage then engine by doing so.but no I would not propose putting regular in a S420.
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| Mon Sep 17, 2007 6:32 pm |
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Alex1
Mentor
Joined: 23 Oct 2006
Posts: 4628
Location: Irvine US |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Unleaded premium is suggested only.
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| Mon Sep 17, 2007 6:32 pm |
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lilred
Mentor
Joined: 05 Nov 2006
Posts: 4656
Location: Windsor Ontario |
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| Can I put regular gas in my 1998 mercedes s 420? |
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I could verify with the owner's manual on this one. Most cars run proficiently with regular unleaded, as it was proven thru buyer reports that the grade of gas is not really important, unless of course it is a high performance car. Some European models although, are DIESAL only and putting regular gasoline in it'll damage it.
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| Mon Sep 17, 2007 6:32 pm |
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Clovers
Mentor
Joined: 20 Nov 2006
Posts: 4690
Location: Knoxville, Tennessee |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Nope gotta put premium in it. usually it depends on what went into the tank when it was 1st bought. If cost is the issue you may be able to purchase octane increase at most any auto parts store or gas station.
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| Mon Sep 17, 2007 6:32 pm |
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Buduwoodoo
Mentor
Joined: 16 Nov 2006
Posts: 4600
Location: Tacoma,Washington |
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| Can I put regular gas in my 1998 mercedes s 420? |
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you can put regular in it, but do not expect as good of performance, though you'll save money.
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| Mon Sep 17, 2007 6:33 pm |
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Kamaris
Mentor
Joined: 10 Nov 2006
Posts: 4473
Location: Detroit the rock city |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Your car has a knock sensor on it that can give a false reading if you use regular gas. You may not notice it at 1st but over time it may because more problems. The sensor is to keep the car from misfire firing and low octane fuel burns slower so the sensor may attempt to up the amount of fuel or change the spark time to correct it.
If it adds more fuel you will end up burning the catalytic changes out and that's costly to replace.
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| Mon Sep 17, 2007 6:33 pm |
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Lolerfalls
Mentor
Joined: 19 Nov 2006
Posts: 4679
Location: Bakersfield Cali US |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Not a smart idea. you may be able to use regular in an emergency, but do not drive with a heavy foot while regular is in the tank. you may be able to do bad things to your valves and head gasket with low octane fuel.
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| Mon Sep 17, 2007 6:33 pm |
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Brett
Mentor
Joined: 26 Nov 2006
Posts: 4673
Location: Chicago Illinois usa |
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| Can I put regular gas in my 1998 mercedes s 420? |
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unleaded only
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| Mon Sep 17, 2007 6:33 pm |
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Alex1
Mentor
Joined: 23 Oct 2006
Posts: 4628
Location: Irvine US |
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| Can I put regular gas in my 1998 mercedes s 420? |
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yes and no, Yes only if there's no premium gasoline available, then you may add a mixture of regular gas in addtion to the premium requried. No as indicated by Mercedes Benz, they don't recommend running any mercedes benz under regular gas, caused by the low octane in regular gas, mercedes engines are complex and require a lot of energy to run, premium gas 92 octane . They say if there's no premium gas then you may add a little to the gas tank.
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| Mon Sep 17, 2007 6:33 pm |
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Jonker
Mentor
Joined: 19 Nov 2006
Posts: 4618
Location: Detroit, Michigan, US |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Mercedes are premium only why, could you do that?
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| Mon Sep 17, 2007 6:33 pm |
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Fastride
Mentor
Joined: 20 Sep 2006
Posts: 4684
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| Can I put regular gas in my 1998 mercedes s 420? |
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What does it say on your fuel gauge, or inside the gas door?
If it says PREMIUM UNLEADED ONLY.
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| Mon Sep 17, 2007 6:33 pm |
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Fast Chica
Mentor
Joined: 19 Nov 2006
Posts: 4560
Location: Miami FL US |
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| Can I put regular gas in my 1998 mercedes s 420? |
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You can, but you'll regret this tremendously.
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| Mon Sep 17, 2007 6:33 pm |
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jankom
Mentor
Joined: 23 Sep 2006
Posts: 4736
Location: Torrance, Ca, USA |
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| Can I put regular gas in my 1998 mercedes s 420? |
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Dont listen to these people. I drive a lexus lx470 with a alike engine size and I use regular in spite of its demand for premium. My car now has 150,000 miles on it and still runs also as the day I bought it. While there are some small decreases in performance, it'll not be noticed unless you take the car to the track frequently. As for an engine malfuntion, knocking and wha not isn't a concern for a sophisticated engine like yours. Also Road and Track and Motor Trend staff give the same opinion as I have.
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| Mon Sep 17, 2007 6:33 pm |
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TyH
Mentor
Joined: 23 Nov 2006
Posts: 4564
Location: Dallas Texas USA |
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| Can I put regular gas in my 1998 mercedes s 420? |
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yes you may be able to but it'll just ruin the in general performance of your car. why save on the small % in the cost? and to think that you're able to purchase a MB S420
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| Mon Sep 17, 2007 6:33 pm |
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pharx
Mentor
Joined: 10 Nov 2006
Posts: 4695
Location: Birmingham AL |
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| Can I put regular gas in my 1998 mercedes s 420? |
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premium for all mercedes
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| Mon Sep 17, 2007 6:33 pm |
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