Shouldn't have swapped spark plugs
#1
Shouldn't have swapped spark plugs
Yesterday, I changed my spark plugs and wires. The wires were replaced with the same as before, but for the plugs, I went from Bosch platinum 2 plugs to Champion coppers. The truck runs as smooth as ever, but it seems that my fuel economy has suffered. With cruise control set at 50, the overhead computer would vary between 17 and 21 mpg. Now at the same speed, the computer varies between 16 and 18 mpg. Could it be that the old plugs were better? or are there any other suggestions of what could have caused this?
#5
#7
Join Date: Apr 2008
Location: Lee County, North Carolina
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i noticed a little less mileage and a little less power when i switched off of my bosch platinum +4s to the truck plugs, then i took those out and put the champion platinums in. all three are the stock heat range.
you need to check your mileage by resetting the trip meter when you fill up then the next time you fill up divide the miles driven by the amount of gas you used.
ie: 275 miles divided by 21.5 gallons = 12.79 mpg.
you need to check your mileage by resetting the trip meter when you fill up then the next time you fill up divide the miles driven by the amount of gas you used.
ie: 275 miles divided by 21.5 gallons = 12.79 mpg.
Last edited by Sheriff420; 07-12-2009 at 10:17 PM.
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#9
Oh yeah, forget the brand names, it's not that important, but what matters is you went from
a high performance double platinum plug down to a standard copper core one, there's less
conductivity hence your spark isn't as strong and the end result is a slower or less complete burn.
It all happens in a flash, but in time-lapse photography the stronger the spark, the better.
Them 2x platinums don't cost $4 each for no good reason
But you might try Autolites instead of Bosch, I think they might be a little cheaper.
a high performance double platinum plug down to a standard copper core one, there's less
conductivity hence your spark isn't as strong and the end result is a slower or less complete burn.
It all happens in a flash, but in time-lapse photography the stronger the spark, the better.
Them 2x platinums don't cost $4 each for no good reason
But you might try Autolites instead of Bosch, I think they might be a little cheaper.
#10