Tonight I had to put some 98 Octane fuel in my 659cc 2004 Copen (95 wasn't available where I was). Am I imagining it, or is the car totally different on 98??? The drive home was like being strapped to something else altogether!! I had a friend who always claimed that 98, although more pricey, actually ended up being more efficient and cheaper in the long run. Anyone who's done some actual stats care to confirm?
Hi a guy who I was working for raced performance cars said copens running on 98 octane would make a massive difference and he wasn't wrong because it's only a tiny engine and needed the best fuel
The car is made to run on 91 octane, so even 95 is fine. Maybe its just subjectively. But with Daihatsu you can never know. My aunt had a L701 cuore and swore by "Aral" (german subsidiary of BP - they make pretty good fuel, maybe you have heard of "Ultimate 102") because otherwise the car would not run right.
I'll run this tank of 98 down then go back to 95 for the next tank. It definitely "feels" better. More "get up and go"...it's actually brought out the inner "hoon" in me. I should probably calculate some mileage stats on each tank and see how it pans out. 95, and even more so 98, are quite expensive in Australia. How I wish it could use E10!!
You still have 91 octane in Australia? We get 95 E10, 95 E5, 98, and at some stations even 100 or 102 octane I also had that feeling of getting going faster once when I filled up with Super Plus 98. But honestly, it could just have been the weather Given that your driving habits are consistent, you could compare it week by week, using different brands and octane ratings. Could get interesting E10 might be cheaper (2 cents a liter in Germany), but you also need more of it, so it might not be worth the risk
No matter what you're doing, the ecu does it.. no more power or etc..fill it with nitro, but be careful with e10
I always run 98 in mine since that's what it was tuned on and it's not my daily driver so cost isn't an issue. If you are just commuting 91 would be fine as the knock sensor will detune it to suit. Since 98 is about a 25 cpl more than 91 it's the economical choice too. If your going for a spirited drive switch to 98 Daihatsu says NO to E10 in OZ
I don't see 91 very often, and even 95 is not at all stations. Tank is practically empty now so I'll capture some mileage stats.
I finished my tank of 98 and now making measurements of the 95. I can already tell just from the fuel gauge that the 98 got me more km to the litre, will post results when done.
Final results. Not totally scientific but... I got 429km for a tank of 98 438km for a tank of 95 I worked out the 30.58litre tank of 98 was 14KM per litre The 27.62 litres of 95 got me about 15.8 KM per litre. So the 95 was more efficient. BUT the car didn't feel the same on the 95. I'll buy 98 when it's cheap here, and 95 otherwise.
That's great work! I just find that 98 Octane does make the car feel a bit more perkier on my 1.3... It could be because my pocket is a bit lighter as its costs a bit more... Most of the time I use 95 Octane but every couple of weeks I'll put in 98 Octane for some spirited driving :-D
Oh, oh... I always used E10 in my Sirion, which I drove absolutely trouble-free for 8 years. When I got the Copen, I just kept on using E10. Now I find out you're not supposed to. Can someone tell me why? Does Daihatsu actually say "No"? Have I already wrecked the engine by using E10 in it for 8 months? I've never tried any other fuel, but it seems to go alright as is.
Diahatsu said no. Generally has something to do with rubbers or seals that degrade using E10 not that it will damage the motor so much. I'd avoid it as much as possible but its probably fine to use it if you have to from time to time.
Copens don't use much fuel anyway? When I bought mine I immediately put 98 in it straight away. Its just better all round and any extra power you can squeeze from the small engine is a bonus isn't it?
You can use E10 in your Copen if the VIN is this or higher: JDAL881K000004707 (production date: April 2008) So all the JB-DET engined Copen are not factory equipped to handle E10
I understand there are places in the world where there is no petrol fuel that does not have ethanol in it. Sometimes up to 25%. What would these people do?
