. Trains have steel wheels so once they get going it takes a lot to stop them.
. Now drive the roads like you would on a bicycle...in other words you can see a hill approaching so you speed up a bit on the flat section at the bottom and coast up the hill. No bumper to bumper traffic either so you don't have to touch the brakes next to never. Instead of maximum speed, knock it back to 55. Do all these things regularly and you will see it improve further.
Simple physics
Going from 27 to 42 is in fact magical and I'm not being silly or funny. I've been a VW enthusiast my whole life and I'm astounded. I would also recommend filling up then using trip odometer then drive a few days then fill up again then divide gallons by miles gone and calculate old fashioned way for a mpgs. Car computers and dash clusters are known to have issues when 14 years old.
But hey that's FANTASTIC if its real! Maybe your car is magical!!!!
You probably should confirm with the old reliable method of knowing your mileage. Fill up then take note of your odometer and gallons you filled up and on the next fill up do the same thing, and see how many miles you've driven and how many gallons you used.
If that number is the same as your scan gauge. Then your car is magical. If not, maybe your scan gauge is faulty.
Somebody is adding fuel to your cat at night while you are asleep.
You get what you pay for
Use fuel octane recommended by VW. Calculate m.p.g. by : writing down miles at full tank. Drive down to at least 1/4 tank. Fill up tank 2nd. time: write down miles and number of gallons. Divide difference in mileage from 1st. fill up by gallons used. That's actual m.p.g.
The car you have with the engine that you have may require that you run a higher octane of fuel. Running the lower octane may result in your engine making a plunking noise, and it may harm your engine. Consult your vehicles manual and it will tell you the octane of fuel that your vehicle requires.
The higher the grade fuel the more efficient it will burn. The tune up also helps in the amount of fuel burned.
So I have a 2000 Jetta VR6 5spd manual. I usually get about 8.7 l/100km(27mpgUS) as my average fuel economy for my commute. Recently, I had a new coilpack and sparkplugs installed and mileage increased slightly. Today, I filled it up with premium fuel after running regular and going on my commute had me average 5.5 l/100km(42.7mpgUS) as measured by my ScanGuage II(it is usually very accurate). Thats 70% highway too. So what, does Premium make that much of a difference? Like 5.5l/100km is what my uncles 2012 Jetta DIESEL gets.
