Anybody here have experience on these premium fuels?
1. Did your fuel consumption (L/km) improve?
2. How is the engine performance? Less noise? Better acceleration?
3. They claim to "clean" the engine, and I'm not sure how to quantify this. Was your fuel filter clean-er in the last change?
If in the long term a cleaner engine can reduce my maintenance cost then maybe I can accept the price hit.
Don't do it for the performance. Speed limit is 120 km/h anyway
as far as i know, this special ultra high-tech diesel is snake oil...
my father tried it in the BMW x3 - the $/km was higher, that's all...
i know it better from normal gasoline where you can get a difference between 95 and 98 octane and even 102 octane BUT ONLY if you tune the engine accordingly. otherwise the improvement is marginal...
a reason for cars that they should be filled with the 98 is that they meet the euro whatever emission rate.
to save money (i guess that's what you try to do) it helps to select the pump station wisely.
in uster, either go to the coop station in volketswil (easy to reach from the motorway) or the one in dietlikon (from the A53, just take the left lane, at the red light turn right) - subscribe to the coop-pronto newsletter and get some 3 cent or 4/5 cent vouchers.
also, try some "freie tankstellen", that means smaller ones that are not bound to the big players, there are some in the outskirts of uster.
hope that helps
those coupons, just copy them! i do this all the time
and always show the cumulus or superpunkte card!
yes, they have an expiry date, usualle 1-2 month from the date they are found.
yes, they have a code (EAN13), but it's not unique. you can copy them as much as you want!
Because the diesel cycle expands at constant pressure, they basically "knock" by design. For diesel fuels the cetane number is the normal measuring standard. Higher cetane will combust faster. The result is smoother operation, and perhaps higher efficiency. There may be other complexities like winter blends, low sulfur which probably do something, but not noticeably. The question still remains; is it worth it?
i think we fall back to the "clean" aspect to decide if it is worth or not. is the emission lower? less guilt for me when i meet the green people. if it also leads to a cleaner engine, then maybe long-term maintenance is cheaper and passing the MFK maybe a breeze...
The gasoline ones never did anything for my Audi s4
I have 1.4 petrol turbo engine. Recommended gas is at least 95.
Does it make any sense to fill in 98 (not only in terms of consumption but also cleanliness of engine, etc.)? Is it OK to mix 98 with 95 if I have about 1/2 of the tank filled by 95 or it's better to burn as much 95 as possible before the change?
Sorry for the off-topic...
Most car fuels contain some additive formula or the other and it's not just marketing. The V-Power additive formula contains their design set of detergents to clean the injectors, valves, cylinders, etc., and contains a friction reducer as well. I've used it for a long time and have found it does enhance engine performance, measured primarily by the difference I feel when forced to fill up with some other fuel because V-Power wasn't available.
This sort of stuff gets measurbated to death and gets nowhere, however if you try a few tanks of something and you have the feeling your car likes it or not, that will likely be the best answer.
That all said, if you tank some cheap off the wall fuel that does not contain the right additives, your engine will foul and you will eventually get the bill for it.
i'll try the v-power on the next load and get back here for my experience...
which diesel do you consider "cheap" and avoid?
mixing will not matter, unless you are trying to reduce knocking. But again: modern engine management can usually adjust the ignition timing to compensate for knocking, so you probably dont have a knocking problem to begin with.