Changing oil better gas mileage
Check your manufacturer’s recommendation, but it’s a good idea to change them every 100,000 miles to keep fuel pressure in the ball park and your vehicle on the road. A failed fuel pressure regulator can cause either too much fuel pressure or none. You’ll get worse gas mileage and your engine will knock if you don’t have sufficient octane in your gas. E85 fuel has about 25% less energy than regular gas, so make sure that it’s at least