whats wrong with my car?
07-18-2018, 09:26 PM
#1
Pro
Thread Starter
whats wrong with my car?
on a road trip with the missus and the P. SF-Ashland OR, Crater Lake then Portland OR, and home in a week. A few jaunts to 135+, (shush. the missus was dozing) and so far i can’t get the mpg higher than 25.3. whats wrong with my car. please help.
07-18-2018, 10:07 PM
#2
I'm not sure if anything is "wrong" with your car, but as a data point, a month ago I drove almost the same trip (up to Salem) and averaged 30.2 mpg round trip at around 80-85 mph avg. That was in my 2015 C2 w/PDK in "eco mode," i.e., all console lights off.
07-18-2018, 10:29 PM
#3
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PDK or MT?
Are you using 7 th gear?
Tires pressures?
All maintenance up to date?
Good fuel? No more than 10% ethanol?
Turn off PSE.
Run with auto stop start engaged.
Don't use Sport Plus.
In 7th gear, at 76 mph, on road trips I can easily get 30 mpg.
Are you using 7 th gear?
Tires pressures?
All maintenance up to date?
Good fuel? No more than 10% ethanol?
Turn off PSE.
Run with auto stop start engaged.
Don't use Sport Plus.
In 7th gear, at 76 mph, on road trips I can easily get 30 mpg.
Last edited by LexVan; 07-18-2018 at 10:50 PM.
07-18-2018, 11:26 PM
#5
Rennlist Member
jaunts to 135 will definitely lower your mpg, significantly. Any speed above 80 mph will lower the economy a lot. Your numbers (25.3 mpg) is right in line with my experience, usually doing 85+ mph on a road trip.
07-18-2018, 11:28 PM
#6
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How many miles are you basing your mpg on?
07-18-2018, 11:58 PM
#7
RL Community Team
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I would be worried if I was consistently getting 25.3 MPG.
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07-19-2018, 12:48 AM
#8
Pro
Thread Starter
PDK. 325 miles to Ashland. Just posted for ****s and giggles. However, the car just seems to take over as soon as the co pilot starts to snore. Going thru Shasta the sport+ comes on by itself.
07-19-2018, 07:53 AM
#10
Rennlist Member
I average 19 mpg.
But if you want to check your car, reset your trip computer while you are on the highway and just cruise at 75 mph for a while and then check it again. It will be pretty good.
But if you want to check your car, reset your trip computer while you are on the highway and just cruise at 75 mph for a while and then check it again. It will be pretty good.
07-19-2018, 11:34 AM
#11
Rennlist Member
On the highway, I get the 30 mpg. Have the 991.2 4 Targa GTS. When I bought it in SOCAL drove it in the 80 - 85 mph range with a few inadvertent increases to 120 while passing (didn't realize it till I noticed on the speedo OMG). Made it to San Jose on the one tank of gas. This is before it was broken in. Have PDK and it was in Standard mode.
07-19-2018, 01:53 PM
#14
07-19-2018, 09:51 PM
#15
Three Wheelin'
Car should easily get 32+ mpg cruising at 80mph on a highway in 7th with all performance modes turned off. Not a lot of fun but works if you've got miles to burn to get to your destination.
