Monday, Sep 11, 2006 at 13:59
fisho64
Mine goes more like 235l @ 17/100 (it's a 4.2) = 1382km x 37 fills = 51134 = a bit over a year for me.
I am no mechanical technician (perhaps someone else can help), but my understanding is:
Firstly, Diesel/Gas & Petrol/Gas are 2 different animals.
With diesel the gas is effectively an addative injected into the air flow. 0% at idle - 30% (?) max load. The motor itself is untouched and always operating on diesel. If you run out of gas, no problem, you just loose the benefits which are:
20%+ increase in HP
20%+ increase in torque
Torque comes in 500-600rpm lower
20-25% less diesel use
Motor and turbo run quiter under load
Motor subjected to less carbon & soot; oil stays cleaner
Normally a diesel burns approx. 85% of fuel in cylinder and is still burning as it enters exhaust. Gas ignites after the initial diesel flare (diesel ignites 385c, and gas ignites 500c) giving a final burn to the fuel, which is now more spent leaving the cylinder. There is a marginal decrease in EGT for this reason.
Effectively the mix (not either or) gives you more effective bang for your buck.
I have had
mine for 5 months, and believe the mix gives gas better than 1 to 1 in the final fuel use outcome.
I tend to use the the power, but sure if you drove for economy, it may be far more significant than for me.
PK
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