Oils ain't Oils, Harry. Fuel use by 2006 N/A Forester

I currently use Mobil Formula S2 10W-40 (Semi-synthetic) in my N/A 2003 Forester, I have kept a fuel log from Day 1 of ownership in this Excel Spreadsheet.

Over the life of the car I have never bothered to relate the l/100k or MPG to the different oils used.
 
Update on fuel economy at 18 Feb 12 fill

Gidday Folks

Last tank was 100% city driving with about 40%+ stationary!! Also about 40% short trips.

Mostly with air-con on.

Also tried using 5th HR between 55~60 km/h for the entire tank.

Results?

53.64 L 436.2 Kms = 12.3 L/100 kms.

I have switched back to using only 4th HR at < 60 km/h (no use of 5th HR until at least 65 km/h ... ) since the beginning of this tank, as this is around 2100 revs, and healthier for the engine with better responsiveness in traffic.
 
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some how im getting the best fuel economy ive ever had in my forester! usuing castrol magnatec fuel saver. i wouldnt think it would make a difference but my last tank of fuel using premium 95 i got 8.15L per 100km! this was a mixture of inner city driving of melbourne, highway, and suburbian. i thought 8.15 was awesome!! my best is aroung 7.5 which was the tank of fuel before this last one which was just highway driving
so i dont know whether its the oil or not but either its efficient!
 
I am also a fan of full synthetics. I changed to Mobil1 10-30 after the run in service but went to 5-30 from about 75,000klms ( now 122,500). This was after i found the 2.5 was suitable for 5-30 and used to use Mobil1 5/30 but it got a bit dear so went to Castrol Edge 5/30 but am now back to Mobil1 which is about $84 for 5ltrs.
The best i have ever got from a tank is about 670/680.
I did have full synthetic in the gearbox and diff from the 50,000 service to the 100,000 service.
I can also suggest trying the NGK Iridium IX plugs. These are well worthwhile. Around $17 each from Superchina. Last around 50/60,000.
I picked up approx 1/2ltr per 100ks and the car was better down low.
 
silver said:
I can also suggest trying the NGK Iridium IX plugs. These are well worthwhile. Around $17 each from Superchina. Last around 50/60,000.
I picked up approx 1/2ltr per 100ks and the car was better down low.
Click to expand...
Thats good to know, as I'll be replacing my plugs fairly soon :ebiggrin:

Regards
Mr Turbo
 
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