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I think the Omega 3.0 V6 is 0.3 gal per hour.
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Hmmm - according to those figures you could potentially let your car sit at tickover for over 2 days on a full tank. Anyone know how much a diesel uses?
On that note, if you ever get stuck in snow or whatever in the cold you could just leave your engine running until you're rescued the next day. :-)
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Old carburettor engines used quite a lot of petrol at idling, because of the inefficiencies of the system and the need to compensate for petrol that didn't vapourise fully or got lost on its slow way through the inlet manifold.
In contrast, traditional diesels used next to nothing, because they got a minute shot of fuel straight into the combustion chamber, just enough to keep it ticking over. Hence the habit of farmers and boat owners leaving their diesels idling for ages rather than turning off.
I'm not sure about modern injection engines - presumably they ought to use very little fuel too, but unless it is direct injection into the combustion chamber maybe there are losses through slow-speed inefficiencies.
Then that starts the old argument about switching off v. leaving running. Starting up presumably uses a bigger shot of fuel, which might outweigh the saving in the very small idling consumption. Not to mention starter gear wear.
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I worked it out the other day, and my car does approximately 0 mpg when stationary.
I knew I should have bought something more frugal, that's terrible fuel economy.
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"On that note, if you ever get stuck in snow or whatever in the cold you could just leave your engine running until you're rescued the next day. :-)"
Where they might find your warm but very dead rosy pink body poisened by the carbon monoxide fumes.
------------------------------
TourVanMan TM < Ex RF >
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Better than a cold but very dead blue body?????
But seriously, I thought the survival advice was to clear the snow around the exhaust but keep the car warm. This presumably is not such a problem in the UK because most strandings are in about 2" of snow anyway!
abcnews.go.com/GMA/story?id=125501
--
pmh (was peter)
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My diesel says 0.1 gal/hour.
I read diesels are particularly efficient due to there being no throttle and thus much reduced pumping losses.
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My 2000 Vectra 2.5 V6 GSi Estate (the last car I had with an instantaneous consumption display that actually gave something 'useful' at tickover rather than **.* !) used to read 0.3 gph, the same as for the 3.0 referred to above. On cold start it read .6 gph, quickly dropping to .5 gph.
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The comment above regarding direct injection using less fuel makes sense. My previous Vectra read 0.3 gph on the fuel computer and wasn't direct injection. My current Vectra, as mentioned above, reads 0.1 to 0.2 gph and has direct injection.
On the other hand, it may just be an inaccurate fuel computer!
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My V6 Omega used to read 0.3 gal/h, both 2 litre Omegas read 0.2 gal/h*, I assume these are vaguely accurate as the average consumption of a tankfull never varies by more than 1 mpg between the computer & my excel spreadsheet of brim to brim. Looks like direct injection probabaly does save some fuel at tickover.
* the older one with aircon would increase to 0.3 gal/h with the aircon on.
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