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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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Toss MPG after changing fuel filterViews : 563 Replies : 6Users Viewing This Thread : |
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Mar 6th, 2022, 16:37 | #1 |
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Toss MPG after changing fuel filter
Exactly what the title says. I put a new Mann Filter in the other week. The old filter was a bit black in colour. I did all the things properly, screwed the cap down, primed etc. got rid of any air locks, and I have no leaks.
However, since then, my mpg has been mediocre at best. I don't think the readout tells the whole truth anyway but it was telling me I was getting late 50s, low 60s on a good run. Now, on urban parts of my commute, I'm looking at low 30s, and no higher than 54 on the motorway. Oh yeah, I've also been using a shot of Millers eco on a full tank. Any ideas?
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Crazy L, The Original since 1976 |
Mar 6th, 2022, 22:27 | #2 |
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What car/engine do you have?
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. __56 C70 D5 SE Geartronic |
Mar 7th, 2022, 10:22 | #3 |
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Crazy L, The Original since 1976 |
Mar 7th, 2022, 13:08 | #4 |
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I'm not sure the trip computer's MPG is to be relied on TBH. Ours shows between 48 and 49 mpg (1.6D) regardless of whether you do short or long journeys or drive it like a saint or quicker. All of that after resetting it.
The only accurate way I've ever got an idea of mpg is brimming the tank, note the number of litres on refill and mileage done then do the maths. I'm not sure why a filter change would impact your fuel consumption TBH.
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Present: 2009 Volvo V50 1.6D DRIVe SE Past: 2004 Volvo S40 T5 SE |
Mar 7th, 2022, 15:21 | #5 |
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LOL, So you've figured that out too, lol.
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Crazy L, The Original since 1976 |
Mar 7th, 2022, 13:10 | #6 |
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With fuel and air filters, if the old ones are really overdue for a change, then the ECU may have tuned the adaptation values to cope with the blocked filters, and it may need a couple of fills to get it tuned back to the optimum values for good clean filters.
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Mar 7th, 2022, 15:23 | #7 | |
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Quote:
Said it before and I'll say it again. This engine isn't a patch on the 1.9 PD I had in my Mk1 Octy.
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Crazy L, The Original since 1976 |
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