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Ignoring what the books says, what is a realistic MPG?

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15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHIgnoring what the books says, what is a realistic MPG?

Leading reported evidence

Install cold air intake system sounds great

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just returned from a long blast to london(history museum) and got around 28mpg(motorway miles) used to get 25\26\27 normally untill fitted cold air intake system sounds great but dropped mpg to low 20's

Ignoring what the books says, what is a realistic MPG?
Frequently discussed work

Check hydro-carbon levels etc

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Suggestion · Original poster

I will check my hydro-carbon levels etc.

Ignoring what the books says, what is a realistic MPG?
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Leading evidence: 'Install cold air intake system sounds great' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check hydro-carbon levels etc' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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1 matching discussions · 15 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Check hydro-carbon levels etc

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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Suggestion · Original poster

I will check my hydro-carbon levels etc.

Ignoring what the books says, what is a realistic MPG?

Reset = higher mpg)

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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Suggestion

more miles since last reset = higher mpg).

Ignoring what the books says, what is a realistic MPG?

Run provided in both cases

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Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

i find it easy to get 20 mpg on an urban cycle, and 5 more on a long run, provided in both cases that i dont thrape it!

Ignoring what the books says, what is a realistic MPG?

Use ")

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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion

I had a Boxster S for 3 years & covered 62K miles, average mpg 26-27 ("business use").

Ignoring what the books says, what is a realistic MPG?
Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check hydro-carbon levels etc

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Read evidence and context
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I will check my hydro-carbon levels etc.

Ignoring what the books says, what is a realistic MPG?

Install cold air intake system sounds great

No successful repair reported for this finding.

0
Reported fixes
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Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

just returned from a long blast to london(history museum) and got around 28mpg(motorway miles) used to get 25\26\27 normally untill fitted cold air intake system sounds great but dropped mpg to low 20's

Ignoring what the books says, what is a realistic MPG?

Reset = higher mpg)

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

more miles since last reset = higher mpg).

Ignoring what the books says, what is a realistic MPG?

Run provided in both cases

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

i find it easy to get 20 mpg on an urban cycle, and 5 more on a long run, provided in both cases that i dont thrape it!

Ignoring what the books says, what is a realistic MPG?

Use ")

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I had a Boxster S for 3 years & covered 62K miles, average mpg 26-27 ("business use").

Ignoring what the books says, what is a realistic MPG?

Use tesco 97ron

No successful repair reported for this finding.

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Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I am currently using Tesco 97ron, so I am now convinced there is a problem somewhere.

Ignoring what the books says, what is a realistic MPG?
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

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Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

900 miles so far in my MY00 C2 and according to the dash it is returning 16.5mpg I know I drive properly :wink: and I was expecting a low return but this is a bit too low for my liking, more in a sense that I think a pipe may be disconnected or a vacuum leak? If I reset and drive dead careful I can achieve maybe 24 to 26 but it doesn't last. A typical drive for me is to obide the rules and have the occaisional blast, I do tend to stick to the speed limits but like to get there quick and go round anything that is travelling under the said limit for that road (when safe to do so). My MY02 Boxster used to return 27 - 30 MGP with same driving style. Book reads 22ish but what is realistic? Really interested to hear what other owners are getting, especially 3.4 models. Cheers Lloyd

POST 2Original post

just returned from a long blast to london(history museum) and got around 28mpg(motorway miles) used to get 25\26\27 normally untill fitted cold air intake system sounds great but dropped mpg to low 20's where worcestershire i'm kiddy!

POST 3 / ORIGINAL POSTEROriginal post

Small world, just moved from Crestwood (by West Mids Safari) now live in Bewdley

POST 4Original post

I get 25mpg but if I drive really carefully I can get 25.5mpg :sad: TB

POST 5Original post

it was on 5th gear a few years back almost impossible to get book MPG figures as they are lab tested so real world is always less Note, other half's BMW 320d, always 10mpg short of claimed

POST 6Original post

25mpg as near as dammit over 12000 miles of mixed town and open road driving. 97 ron fuel.

POST 7Original post

I get average of 24 mpg out of my C4. Mixture of spirited driving on country roads and a few long motorway cruises thrown in. 16.5 is getting close to track day or City centre driving.

POST 8Original post

I had a Boxster S for 3 years & covered 62K miles, average mpg 26-27 ("business use"). With yr 00 C2 3.4, same driving style (sic) & similar journeys I can not get better than 23mpg avge per tank although it has never dropped much below 22mpg. Town driving is murderous on consumption, I guess I must get over 25mpg at motorway speeds. The way the fuel guage drops reminds me of the guage of a petrol Range Rover I once had although Porsche tank is miniscule - I get between 250 - 270 miles per fill up. Note: my calc's are always my own as car computers are optimistic, the optimism increases with miles (i.e. more miles since last reset = higher mpg). 300bhp/3.4 litre displacement should gobble fuel, 23mpg is not bad.

POST 9 / ORIGINAL POSTEROriginal post

250ish is about what I am getting from a full tank, although expensive it certainly won't put me off the car. Thank you for your input :thumb:

POST 10Original post

Tesco 99 petrol, and over 23K miles of ownership, north of 25mpg, closer to 28mpg according to the trip computer.

POST 11Original post

My average is around the 23/24mpg mark. I'm sure I used to get more than that before the modded back boxes went on.

POST 12 / ORIGINAL POSTEROriginal post

Managed to climb upto 19.6 now. I am currently using Tesco 97ron, so I am now convinced there is a problem somewhere. I will check my hydro-carbon levels etc.

POST 13Original post

I avoid town like the plague because as you know mpg suffers badly. Ultimately I get 27.1mpg and on exceptional occasions have seen 29.1mpg. However this is from a 3.6L engine. Some have gotten past 30mpg. ~ Maxie

POST 14Original post

The other day after I'd refuelled I reset the counter and drove back into town via the M25 and M4. Reading was around the 29mpg mark even getting up to 34mpg at 1 point, by the time I'd arrived home in deepest London town it was reading 26 so not bad. I do get between 7-9mpg on frequent occasions though

POST 15Original post

i find it easy to get 20 mpg on an urban cycle, and 5 more on a long run, provided in both cases that i dont thrape it! my car is also a tiptronic which i assume is a little more inefficient.

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