15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhat sort of MPG are we getting? 1999 3.4 C4
Leading reported evidence
Run approx 120 return journey, including some very spirited driving
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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
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
Around 30 mpg, mixed run, approx 120 return journey, including some very spirited driving.
Leading evidence: 'Run approx 120 return journey, including some very spirited driving' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run approx 120 return journey, including some very spirited driving' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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
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
Should easily be getting over 30 on a clear motorway run with the engine up at temp.
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
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
After the first 6 months of ownership I can report MPG for 1000 miles of mixed driving but few long Motorway stints as around 28mpg-30mpg. I am totally surprised. I am doing some hard acceleration although most of the local roads are timed 40 mph cameras, so limited in that respect. I do drive sensibly, but clearly this is an efficient engine. I had a 2014 Type R Golf and got a pretty much an identical figure for Urban and on the Motorway about 36 mpg. I also had a ton of problems when I bought the Golf from a VW dealer, it's so for so good with the Porsche except the door window drop and battery drain.
I get between 23-26mpg regardless of driving style in my 99 C4......... alot better than the 9-12mpg i got in my corvette
i don't tend to take her on the motorways much.... A and B road blasts are far more rewarding.
My 3.6 averages about 22 mixed driving but 28-30 on a (rare) motorway run. Had it as low as 14 on a spirited early morning 40min blast though. I find at slower cruising speeds 40-50 its happier and more economical in 4th/5th with the revs up over 2000/2300 than it is in 6th.
Last summer I had to go to Scotland on the motorway. Cruise control at 70 gave an indicated 36 but the following months trip to Spain and back was 32 over 2500 miles including the Pyrenees both ways . It’s really economical on a run but round town and going up alpine passes it’s more like 15-18. It’s a 996.2 C2
Around 30 mpg, mixed run, approx 120 return journey, including some very spirited driving.
To be honest for the power delivery, comfort and fun that I get, it's amazing value!
996.1 c4
