Gas milage increase!

[BeeVenom]

I bought Don DiBart's 01VX a couple years ago (long time V-Cross member) and one thing he stressed was the transmission flush and refill. He just did a trans flush prior to me purchasing with synthetic fluids and i intend to follow the same process. I will flush/change at 60,000 miles and continue for as long as we own the VX. All fluids in my VX are synthetic and i think it's worth the extra expense. These transmissions can be finicky and the flush/refill process even with synthetics is cheap insurance for having a long-lasting transmission. I've had no complaints and still love the Proton as i did the first day i purchased it.

[BeeVenom]

P.S.
I'm running ALL SYNTHETICS including engine, transmission/transfer/differential, plus brake fluid and power steering. Again, I think it's a good insurance policy against future potential problems/challenges. One thing i will add is that I've always used Castrol synthetics (i've owned a bunch of british cars.....Castrol is the 'Thing' with british). However, i found through news updates (and publicized law-suits) that Castrol started using petroleum-based stocks in their synthetic oil to cut costs a few years ago which meant that they were NOT really 100% 'synthetic' any more in the true sense of the word.
If you use synthetic engine oil make sure it is a 'Group 4' synthetic and NOT 'Goup 3' synthetic OR less.
Mobil 1 'extended service' is a 'group 4' oil (Red Line and some others are too, but i have not used them). I am now using Mobil 1 Ext. Service.....for what it's worth. If you change every 2000-3000 miles, it may not be a big deal. I do change at 2500 miles but I still use 'Group 4' oil.
Needless to say, i do believe in synthetics for mileage increases and longevity although sometimes you may think it's too expensive. I think NOT!
I do get 16-17 average (even with an Alpine Superchager w/7 psi boost) and have hit as high as 23 mpg on highway with average 60-65 speeds.
Synthetic is the way to go!

[JHarris1385]

Or clean,replace, service your Fuel Pressure Regulator. I have seen a 3-4 avg mpg increase since.

[JHarris1385]

What are the group four oils?

[tom4bren]

One thing to keep in mind about gas mileage right now is that we are now running on summer blend gasoline. Summer blend has about 10% less energy content so your gas mileage will probably be 10% lower as well (maybe more). Isn't it nice how they've set it up where the more expensive gas gives us less performance?