Just wondering ... My first trip with GC in the crankcase produced a 2.7 mpg drop from 29.7 mpg to 27 mpg.
Car is a 2005 Subaru Outback 2.5i.
The last oil fill was Mobil 1 EP 5W-30 with LC20 and VSOT.
The GC is straight out of the bottle.
So I wonder if it needs some break in, since the additives changed?
Or, do I need to add the LC20 and VSOT to get the same benefits I had with the last fill?
I remember that I thought that the LC20 and VSOT helped the M1 5W-30 get the 29.7 mpg to 32 mpg.
I didn't want to mess with the GC additive pack...but a 2 mpg + loss is real money.
Car is a 2005 Subaru Outback 2.5i.
The last oil fill was Mobil 1 EP 5W-30 with LC20 and VSOT.
The GC is straight out of the bottle.
So I wonder if it needs some break in, since the additives changed?
Or, do I need to add the LC20 and VSOT to get the same benefits I had with the last fill?
I remember that I thought that the LC20 and VSOT helped the M1 5W-30 get the 29.7 mpg to 32 mpg.
I didn't want to mess with the GC additive pack...but a 2 mpg + loss is real money.