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#1
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Premium Gas on '92 190E
is it absolutely important to put only premium in that tank? Thats all i've ever put in since i bought it but would it hurt it to use anything else or to mix a couple gallons with the premium?
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#2
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MB suggests 91 RON octane on that & all of their gasoline cars after 1987.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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we use mid grade in all three of ours. We don't run them particularly hard. Occassionally on a real hot week, I might put premium in..but only a couple of times a year.
we have 2.6 and 3.0 engines
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k 1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC] |
#4
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mid grade (89) should be fine, but only you can tell whether or not there is pinging as you drive. You didn't state where you are located - local climate can be a determining factor in the type of gas you use. In my 300E I would run 87 in the winter, 89 in the spring/fall, and 91 or 93 the few weeks of the year it was very hot.
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#5
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If it states to use premium, I would. The price difference isn't that horribly different that it makes a huge difference. Now if the differnce in premium and regular was a dollar, I might consider it. Would you use dexcool in your radiator when it states mercedes only coolant?
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1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#6
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Apples and oranges. Failure to use Dexcool will result in corrosion. Failure to use 91 octane when the engine is not pinging will do absolutely no harm. The manufacturer states 91 octane as an uneducated safeguard for the drivers who don't even know what pinging is.
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#7
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Who's to say his engine will not ping under use of regular fuel? Also I would call that an educated safeguard myself.
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1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#8
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My 190E pings with 87 octane but not with 92. I also get better fuel mileage with the 92.
I would stick with minimum 91 octane to avoid pinging, as you don't hear all the pinging, and the damage is done over a long term. |
#9
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This is turning into an oil thread. I'm out...
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#10
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Octane rating will not affect mileage and pinging will not do any damage to your engine. Detonation will kill your engine but ping is just embarrassing. If your engine has knock sensors you probably won't even get pinging.
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#11
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I just noticed my words being taken out of context:
Quote:
Quote:
Quote:
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#12
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Now its really looking like an oil thread.
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1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#13
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Well, here's one thing I've noticed, and it DOES have to do with oil.
It is my impression that if you have one of the many 103s that burn oil because of the valve seals, you end up with some deposits in the combustion chamber that raises the compression. The car will begin to ping under load after a while, even with premium 93. The only way to rectify the situation is to floor it and blow all the crap out of the engine. I usually wait until some jerk is behind me who won't dim his headlights, or a tail-gater. After a few hundred miles of build-up, this will put out quite a cloud of smoke but it does cure the pinging. And remember, the 102/103s don't have knock sensors. That's my impression. YMMV.
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2012 E350 2006 Callaway SC560 |
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