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user removed · 07-22-2010, 08:24 AM

Forgot some things. VX lean burn threshold is 6 inches of vacuum, if you can't feel lean burn engage.

Without AC lean burn acceleration is practical. Remember to accelerate in lean burn in 3rd gear is about the same fuel consumption as no lean burn in 5th.

The VX has very tall gears, 3rd will get you to about 110 MPH at max revs. A balance of under 2500 RPM operational limit and using 3rd 4th and 5th gears for acceleration may keep you in lean burn more, but dragging out the acceleration phase of operation may not be your best tactic.

My VX is a rebuilt salvage vehicle that I bought in March 2008. It had sat in an insurance training facility (controlled environment) for close to 13 years and had only 27,492 miles on the odometer. It now has 58k miles.

Tires can be a huge factor, with rolling resistance and significant part of any mileage penalty. Run the tires at sidewall max to minimise rolling resistance.

When you are cruising keep engine RPM as low as possible, but above 1000 RPM. Even in 5th at 1k RPM you can still stay in 5th gear. This is where the mileage gets really high, probably close to 70 MPG steady at 35 MPH in 5th with no AC. With AC increase your average engine speed by about 25% while still trying to stay below 2500 RPM.

regards
Mech

07-22-2010, 08:24 AM	#6 (permalink)
user removed Master EcoModder Join Date: Sep 2009 Posts: 5,927 Thanks: 877 Thanked 2,024 Times in 1,304 Posts	Forgot some things. VX lean burn threshold is 6 inches of vacuum, if you can't feel lean burn engage. Without AC lean burn acceleration is practical. Remember to accelerate in lean burn in 3rd gear is about the same fuel consumption as no lean burn in 5th. The VX has very tall gears, 3rd will get you to about 110 MPH at max revs. A balance of under 2500 RPM operational limit and using 3rd 4th and 5th gears for acceleration may keep you in lean burn more, but dragging out the acceleration phase of operation may not be your best tactic. My VX is a rebuilt salvage vehicle that I bought in March 2008. It had sat in an insurance training facility (controlled environment) for close to 13 years and had only 27,492 miles on the odometer. It now has 58k miles. Tires can be a huge factor, with rolling resistance and significant part of any mileage penalty. Run the tires at sidewall max to minimise rolling resistance. When you are cruising keep engine RPM as low as possible, but above 1000 RPM. Even in 5th at 1k RPM you can still stay in 5th gear. This is where the mileage gets really high, probably close to 70 MPG steady at 35 MPH in 5th with no AC. With AC increase your average engine speed by about 25% while still trying to stay below 2500 RPM. regards Mech Last edited by user removed; 07-25-2010 at 08:43 AM..