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Old 07-09-2017, 08:50 PM   #1 (permalink)
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stefanv's Avatar
Join Date: Jun 2017
Location: Ontario, Canada
Posts: 85

2001 Saturn - '01 Saturn SL1
90 day: 41.68 mpg (US)
Thanks: 3
Thanked 54 Times in 30 Posts
New member from Ontario, Canada

Hi EcoModders:

I live near Waterloo, Ontario, Canada, and drive there most weekdays (44km each way) for work. I'd estimate my driving at about 80% highway and 20% city.

I recently became interested in improving the fuel economy of my 2001 Saturn SL1 after researching a more ambitious project, converting a Triumph TR-7 to a viable electric car, and discovering it would be far more costly than I first thought.

I've had the car since 2009, and have been tracking fuel economy since the day I got it, but I no longer have records prior to 2014. Since 2014, my FE has steadily gotten worse:

2014 - 5.85L/100km, 40.0mpg (US)
2015 - 6.24L/100km, 37.5mpg
2016 - 6.46L/100km, 36.2mpg
2017 - about 6.2L/100km, 38mpg until recently

The improvement in 2017 was probably due a tune-up late last year.

However, the last two tanks, I've been driving more carefully. The first tank I just did it by the seat of my pants, and achieved 5.55L/100km, 42.1mpg, which was the best single-tank fuel economy I'd ever recorded.

After that, I bought a Bluetooth OBDII adapter and the Torque app. I only managed 5.73L/100km, 40.8mpg on the next tank, but I was stuck in a few traffic jams on that tank. But that's still way better than my average this year.

When I get interested in something, I go all out, so I plan to start doing some mods:
  • smooth wheel covers (probably fibreglass)
  • rear wheel fairings
  • grill block
  • gap filling
  • full width air dam
  • delete power steering
  • build a comprehensive carputer to replace the Torque app, and provide:
    • DWL cruise control (limited to highway use since it can't shift gears)
    • load-sensitive A/C
    • DFCO at lower RPMs

I've mostly been reading the non-mod hypermiling threads for now in order to improve my driving habits. I look forward to reading more of your exploits, and will share mine here too.

I went through all my photos, and discovered that the only good photos I have of my car are at the dealer's the day I picked it up:

The red SW1 in the background was my old Saturn, which had 340,000km on it the day I left it there.

Last edited by stefanv; 07-10-2017 at 10:37 AM.. Reason: Added a photo.
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