Member Since: 23 Feb 2011
Location: cambridgeshire
Posts: 11
MPG with Pirelli ATR experiences please
So, I have a brand new set of Scorpion ATR ( 18"s) on a manual Disco. Previously with standard fit Zero's the car would indicate between 28 and 31 mpg. Now its consistently indicating 25-28 mpg. I have just had a full main dealer service. Anyone else noticed this much drop off? I have seen quite a few posts indicating no change on mpg, so I am a bit confused. I would perhaps expect a small change but this seems too much. Opinions welcome. EGR etc are all fine.
16th Jan 2012 11:44 am
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23804
No noticeable difference at all in mpg or noise between ATR's and Zero's/Wrangler HP's.
Maybe check that the tyre pressures are correct, using a calibrated gauge not petrol station pump etc. Could be that they're too low.
16th Jan 2012 11:56 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73063
You're not comparing summer with winter mpg? I regularly see 10% drop in mpg with the onset of winter. Sitting at 75mph I get 25mpg on ATRs in the winter & 28mpg in the summer. Cruising at 60mph summer = 31mpg, winter = 28mpg. Similar to what I was getting on 17" Contis. All figs actual, not the over optimistic trip comp.
16th Jan 2012 11:57 am
roofdown
Member Since: 23 Feb 2011
Location: cambridgeshire
Posts: 11
Tyres were set to standard at the service last week, the comment on winter versus summer is a good point tho! I don't mind a bit of a drop given the doubling of tyre life but thought this was a lot
16th Jan 2012 12:01 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23804
That's a valid point about the temp. and don't forget winter diesel doesn't help either.
You may have had the tyre pressure set at the last service, but I'd still check them with a calibrated gauge or one that you know to be accurate. Just a few psi too low would make a difference.
I've done lots of miles on both Zero's and ATR's, never noticed any drop in mpg.
16th Jan 2012 12:23 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6910
I always run about 1 psi more with ATRs than standard (following other threads on here) and never noticed any drop. Remember the FBH will use fuel in winter if its cold and you do an actual calculation.Joined the BMWX5 45e group
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16th Jan 2012 12:29 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23804
Yeah, I like 34 Front and 38 Rear as an everday setting. I suppose that could very slightly increase mpg over the standard LR 33 F 36 R.
16th Jan 2012 1:29 pm
roofdown
Member Since: 23 Feb 2011
Location: cambridgeshire
Posts: 11
I will up them from 33/36 to 34/38 and see the effect. Thanks for the hints
16th Jan 2012 1:41 pm
dsd1036
Member Since: 27 Feb 2010
Location: Surrey
Posts: 2692
34/38 worked ok for me, i'd get 25mpgish around town and into the 30's on motorway runs
16th Jan 2012 1:46 pm
roofdown
Member Since: 23 Feb 2011
Location: cambridgeshire
Posts: 11
Thanks, will change and report back!
16th Jan 2012 1:52 pm
DavidK
Member Since: 28 Aug 2007
Location: Sydney
Posts: 37
roofdown, any change in your mpg when you upped the psi?MY05 TDV6 S - manual, King springs lift, General Grabber AT
23rd Feb 2012 11:14 am
Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
No change in MPG for my 19" ATRs nor my parents 18" ones.DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
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23rd Feb 2012 11:23 am
sarumlight
Member Since: 06 Nov 2008
Location: Off the Plain
Posts: 1592
I reckon they were 2-3mpg worse on the motorway and not much different about town but then they last twice as long as Scorpoin Zero's which buys you a lot of diesel! I reckon over 15,000 miles the ATRs work out cheaper and they don't get torn to shreds if you go offroad
23rd Feb 2012 5:52 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73063
After TFC worked his am magic on my brakes deffo no increase in mpg with ATRs cf 17" Contis.
23rd Feb 2012 5:56 pm
mickyd4
Member Since: 26 Jun 2010
Location: North
Posts: 786
Its either Cooper Zeons or ATR Pirellis after my Scorpions now... What would you go for chaps?2023 Ineos Grenadier 3.0 Diesel Commercial
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