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#1
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mid-grade fuel
Reduced costs??
I have a friend who burns mid grade unleaded in his 96 S320. He says there is no reduced performance or pinging. Would this be a good for my 95 S420? I know the manual say premium. Thanks for input. |
#2
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I am having no trouble with mid-grade in south carolina. I am told we have "good gas" here.....
I have also been told that when it gets warmer, I will likely have to switch back to premium.... I actually noticed a slight increase in gas mileage...about 1/2 mpg...
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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] |
#3
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Use whatever fuel grade/octane that does not cause your engine to PING under a load. In my 1995 SL320 with a M104 engine I have been using 87 octane with no problems for 6 years. In my 86 M103 engine it will only take 91 octane , so go figure
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Jerry 2004 SL500 Black 55K Miles 2002 s500 Black 90K Miles 1986 300E Gold 233K Miles 1966 Twin Cessna 320D 1989 Jeep Cherokee 233K Miles 1994 Ford Van E150 399K Miles |
#4
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Your '95 has a knock sensor that will retard the timing and keep the engine out of detonation. Your '86 does not.
I use 87 PON durilng the winter and have no detonation, but as temperatures warm up, there is some transient detonation, especially if I short shift and get on the throttle quickly. I think it's just a lag in the vacuum advance pulling back, but I can "drive around" the problem by shifting at higher revs or feeding the throttle in at a slower rate. Duke |
#5
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I have been running Reg 87 Oct since I got the car a yr ago! It is the 4.2 V8! The day I bought the car I filled with Reg and I had to drive it back home and climb a Mtn. pass! The car never pinged or felt down on power. I do put in a can of SeaFoam in the tank once a mo. to clean up the sys. After a yr. still runs smooth as silk!
Smokie |
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