Diesel vs Premium Diesel - Alfa Romeo Forum
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Diesel vs Premium Diesel

Any significant difference - or just technobabble to extract more pennies from the sheeple?
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Re: Diesel vs Premium Diesel

I personally don't notice any difference ... although I do between petrol and premium petrol ... I think it varies on a car to car basis ..
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Re: Diesel vs Premium Diesel

not really noticed any difference, I didn't with super in a petrol either.
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Re: Diesel vs Premium Diesel

Not tried the diesel, but the super petrol really made a difference to my old V6.
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Re: Diesel vs Premium Diesel

Between diesel and Optima diesel I did, there was 50 miles more in the tank for the optima, this is not an observation but from Lossie to Lincoln this year in an LDV (gawd help us all) I got further on 2 tanks than I did the previous year.
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Re: Diesel vs Premium Diesel

Significant reduction in smoke and a smoother idle with Shell Optimax diesel in mine. A lasting benefit too, stays good for a few tanks of normal fuel. No economy benefit though.
I did get good economy on a tank of Total Excellium but that could have been the long trip I did on it.
Both worth it for, say, one tank in five if available at a reasonable price I reckon.
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Re: Diesel vs Premium Diesel

I have found my GT 1.9 JTDm noticeably smoother on Shell V power diesel. Nothing noticeable on BP Optimax. Normally put the expensive stuff in every second tank.
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