Return to GC !!

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May 23, 2003
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Hi Since I am disappointed with my mpg experiment so far with M1 10w-30 and VSOT / FC20 / FP60, I will be returning back to the GC fold when the M1 fill is changed out in 5k miles. I have two more cases of GC gold on hand, so am ready to go. I may reorder the FC20 when current supply is exhausted, but dont know about the FP60. I doubt I'll use the remainder of the VSOT.
 
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Click your heels three times and say: "There is no oil like GC. There is no oil like GC. There is no oil like GC."
 
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Only way to tell for sure if your MPG drop was due to your past experiment - is to do the same FP/LC/VSOT experiment with GC. Have you tried this exact experiment with GC prior to the Mobil-1?
 
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You also need to keep using the same gas from the same station at the same time of year and going to the same pump at that station over a few fill ups wouldn't hurt either.
 

lght1

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Hi I drive over 50k mi a year, almost always at the same gas station..and usually the same pump. I can compare mpg going back some 8 yrs (different cars/engines) but usually from same station. The route is almost always the same. I have not run anything with GC but will next GC fill..prob in October. Today's run was over 32mpg, but that was about 95/5 highway. I added 1oz of FC20 last night. ???
 
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What was your mileage before the M1 10w-30 and VSOT / FC20 / FP60? I can't see why you wouldn't go with M1 0W-30 or 5W-30 to compare with GC 0W-30 even though GC 0W-30 is apparently near the upper viscosioty range. Unless one of the GC experts says no, it would be fun to see how VSOT / FC20 / FP60 worked in GC . Maybe drive 1000 miles on fresh GC and then add VSOT / FC20 / FP60.
 

lght1

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Hi Perhaps I will try a GC-VSOT-FC20-FP60 experiement. One thing interesting, is this particular 3800 Series II hasnt touched the M1 brew. The other 3800s I've had would use some in 2-3000 miles. The whole bottle of VSOT must have thickened the M1 10w-30 considerably. Last Sat, with 95/5 type of driving, the car turned in 32.09mpg w/o A/C.
 

lght1

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Hi For years, 26 mpg was the norm for this car and the route i drive. I believe that the long interstate portion of that day's trip accounted for the mileage. This engine/tranny combo hates city driving. The numbers for intown average 15-16 and near/just over 30 for interstate.
 
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