My Car Can Run On 92ron....Can yours? A Revelation.

Guess what? I've recently been using regular 92ron petrol on my Subaru! Isn't that blasphemous using 'cheap' fuel on such a car? Well firstly the vehicle manual says that I can, hence I am. You see, an Impreza TS is an AWD NON-Turboed Impreza which does not need higher octane to run. The reason only reason why you need high octane most of the time is when your car runs a very high compression engine. Currently, such engines have a compression ratio of about 11:1 and above (The Impreza TS has a 10:1 compression ratio). This means cars like certain Porsche GT3s, VW's FSi engines and some Honda VTEC engines. Turbo cars have to run high octane due to the fact that when the turbo kicks in, you wouldn't want any premature detonation of fuel which would wreck the engine and the turbo. Most modern cars have an ECU with knock sensors to eliminate any pre-detonation issues. And if you have a carburettor in your car, all you need to do is go to a mechanic (who knows how to tune carbs) and get the distributor and carb set and you can safely run 92ron.

With my ride, I can feel a slight lack of power above 4,500rpm when I believe the ignition timing (which is ECU controlled) of the car retards slightly as it does not want to give its maximum due to the lower octane. But since we now pay so much for petrol I have been driving like a 'good' Muslim. So I change gears between 1,500rpm and 2,500rpm most of the time and keep the actual Schumi style driving for the weekends when I do pump 97ron petrol for a spin or two. I've calculated and I've found no extra consumption using this cheaper petrol. I can live with the slight lack of power as I can fill in 'power' when I need to.

I honestly can manage to save up to a few hundred Ringgit a year using 92ron most of the time. I usually have to spend an average of 50 liters of petrol a week. At RM2.621 I spend RM131.05. If I spend RM2.70 on 97ron I have to pay RM135.00. Now I see myself on average spending 45 out of 52 weeks on 92ron and the rest on 97 ron for thrills and outstation trips. That's RM5897.25 for 45 weeks INSTEAD of RM6075.00 for 45 weeks. That's RM177.75 worth of petrol savings compared to using 97ron. I get to enjoy this extra AND also the RM625.00 rebate which I will get when I renew the car's road tax. Somehow, I seem to be slightly less effected due to this.

For a slightly more in depth look at the myth of using cheaper petrol, visit the Ugly Chicken blog.My Pal Lee Meng over there will tell you more:

http://uglychickens.blogspot.com/2008/06/dont-waste-money-on-premium-petrol.html

On another note, the change of driving style has actually enabled me to pump as much petrol as I did before the petrol hike. I've actually managed to clock an average of 12.0-12.5km per liter compared to a low 10-10.5km per liter before this. I've actually made an impreza safe petrol! Now if you'll excuse me, I am spending this new found savings on driving to the Audi Showroom at JAYA 33 today at above average speeds to have a look at the new Audi A4 1.8T. I'll eventually write some stuff on this car soon.