Quote:
Originally Posted by SentraSE-R
1200 rpm is probably too low an engine speed for cruising. Your engine's BSFC graph should point you to where you want to be. Usually, your best efficiency is between about 1500 and 2200 rpm for 2 liter class engines.
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True, but potentially misleading. (It needs qualification.)
Your best efficiency might be in that RPM range when accelerating/climbing and you want
high load. But it's not correct to say you'll get better fuel economy
cruising at that RPM when you could use a higher gear.
(I realize you then went on to describe pulse & glide, but I just wanted to bring this up in case someone doesn't make the connection.)
For someone who doesn't want to pulse and glide, driving with load (DWL) at low engine RPM is a good alternative.
I'd have no problem cruising at 1200 RPM provided the engine will do it without complaining (and by that I mean physically juddering). Bestclimb's post above describes lugging nicely.