Gassing Up
I have approx. 4 hours experience driving my new motorhome and am wondering what others find easiest when it comes to gassing up. I have a 30 ft gas coach and will be towing a Ford Focus later this ye...
Forum Discussion
Octane recommendation has to do with compression ratio. The MFG recommendation is based on that. If you modified your engine to increase the compression ratio then you may need to deviate from the MFG instruction. If not follow the MFG.
On mine I do find I get better performance from mid grade (89). Some states the low grade can get to 84, 85 octane so don't just hit the button, look at the octane at the pump when traveling. In today's engines you can't hear the "ping" because the computer adjusts it out, i.e. retarding the timing to stop it, which can lower performance, so don't try to listen for that. If it gets that bad you cna hear it then you have one of 2 issues, a sensor problem or have exceeded the the rating to the computers extreme, like running 84 where you should run 87.
On mine I do find I get better performance from mid grade (89). Some states the low grade can get to 84, 85 octane so don't just hit the button, look at the octane at the pump when traveling. In today's engines you can't hear the "ping" because the computer adjusts it out, i.e. retarding the timing to stop it, which can lower performance, so don't try to listen for that. If it gets that bad you cna hear it then you have one of 2 issues, a sensor problem or have exceeded the the rating to the computers extreme, like running 84 where you should run 87.