13 Eco and Plug Change Inc MPG
07-24-2014, 01:14 PM
#11
Senior Member
I have to say - I'm pretty excited about having changed my plugs in my 2013 Eco. I've got the FX4, SCREW and some nice meaty Duratracs on 18" wheels.
I have consistently gotten 15.1 mpg - no matter if I did a 5 hour highway ride on flat lands, or mixed it between city/highway. 15.1 mpg was it.
I should add that I've consistently run 89 octane my tank as well, however, I put some 91 in it a few days ago - and was still getting the 15.1mpg.
I'm planning on picking up an SCT X4 - so in preparation - and based on some things I've read - I decided to do the plug swap. I suppose I could've just check the gap and cleaned the ones in there (they were the SP-534 from the factory) - but went ahead & picked up a new set and gapped the news ones to .027-.028 (I can get the .026 to slide in/out, but the .028 does not - so I assume it's about .027).
As others have mentioned, the job was pretty easy.
Now - I'm getting an average of 19.1mpg - just from changing those plugs out!!! That's a 4 mpg increase. And that too is from a mix of city/highway - including some pretty steep grades being travelled on.
Old plugs didn't look "too bad" from what I know (I'll post a pic soon) and they were all gapped over .035 (that's as high as my gauge went).
I never had any engine problems prior to this - however, I DO notice that when sitting stopped in traffic or at a light - it's different than before. It's like I have to think about whether the vehicle is running or not. Before, I could "feel" the engine running - now I cannot. I like that.
I've done a few WOT's here & there and it seems to have a little better pull.
Looking forward to my X4 tuner in the next week or so...to anyone who hasn't re-gapped or changed out their plugs - at least re-gap the existing ones.
If I do the math - that 4 mpg increase on a 36 gallon tank equals 144 extra miles per tank. If we know that the vehicle get's 19mpg, we can then say that 144 miles equals 7.57 gallons of gas. Multiply the 7.57 gallons of gas by $3.50 (just a low average gas price around here - its usually around $3.80 and up) - and we get $26.52
So, if I'm doing the math right - we're "saving" $26.52 per tank in fuel savings due to the increased MPG since changing out those plugs at the smaller gap.
Cool.
I have consistently gotten 15.1 mpg - no matter if I did a 5 hour highway ride on flat lands, or mixed it between city/highway. 15.1 mpg was it.
I should add that I've consistently run 89 octane my tank as well, however, I put some 91 in it a few days ago - and was still getting the 15.1mpg.
I'm planning on picking up an SCT X4 - so in preparation - and based on some things I've read - I decided to do the plug swap. I suppose I could've just check the gap and cleaned the ones in there (they were the SP-534 from the factory) - but went ahead & picked up a new set and gapped the news ones to .027-.028 (I can get the .026 to slide in/out, but the .028 does not - so I assume it's about .027).
As others have mentioned, the job was pretty easy.
Now - I'm getting an average of 19.1mpg - just from changing those plugs out!!! That's a 4 mpg increase. And that too is from a mix of city/highway - including some pretty steep grades being travelled on.
Old plugs didn't look "too bad" from what I know (I'll post a pic soon) and they were all gapped over .035 (that's as high as my gauge went).
I never had any engine problems prior to this - however, I DO notice that when sitting stopped in traffic or at a light - it's different than before. It's like I have to think about whether the vehicle is running or not. Before, I could "feel" the engine running - now I cannot. I like that.
I've done a few WOT's here & there and it seems to have a little better pull.
Looking forward to my X4 tuner in the next week or so...to anyone who hasn't re-gapped or changed out their plugs - at least re-gap the existing ones.
If I do the math - that 4 mpg increase on a 36 gallon tank equals 144 extra miles per tank. If we know that the vehicle get's 19mpg, we can then say that 144 miles equals 7.57 gallons of gas. Multiply the 7.57 gallons of gas by $3.50 (just a low average gas price around here - its usually around $3.80 and up) - and we get $26.52
So, if I'm doing the math right - we're "saving" $26.52 per tank in fuel savings due to the increased MPG since changing out those plugs at the smaller gap.
Cool.
What plugs did you go with? I've got a 2013 that only averages 14-15mpg. I'd like to see your gains!
