Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Bogging/Lugging (How can you tell when you are doing the engine harm?)

MetroMPG · 02-09-2010, 01:17 PM

So the concensus seems to be: it's OK to cruise at low RPM and low load.

If you need more power, you should downshift if:

1) the engine lugs (shudders) when you push the accelerator further, or

2) you cause the engine to go into open loop (typically at very high loads - ie. pedal near the floor), which can be monitored with a ScanGauge

02-09-2010, 01:17 PM	#17 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,532 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,082 Thanked 6,978 Times in 3,613 Posts	So the concensus seems to be: it's OK to cruise at low RPM and low load. If you need more power, you should downshift if: 1) the engine lugs (shudders) when you push the accelerator further, or 2) you cause the engine to go into open loop (typically at very high loads - ie. pedal near the floor), which can be monitored with a ScanGauge __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget