2014 Ford Mustang — catalyst efficiency code but car drives normally
2014 Ford Mustang GT, about 145,000 miles. A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes. Be…
Engine
Repairs & Ownership
Question: Porsche Cayman purchase: how much weight do you give a borescope?
2007 Porsche Cayman S, about 62,000 miles. Looking at an older Cayman S with good records. I keep seeing buyers emphasize borescope/PPI work on this generation…
2023 Lincoln Navigator — fuel trims are positive at idle and improve with RPM — anyone dealt with this recently?
2023 Lincoln Navigator Reserve, about 45,500 miles. Long-term fuel trims are much more positive at idle than at 2,500 RPM. No obvious misfire. Does that patter…
TorqueMechanicishCommunity StarterNov 2, 20252023 Lincoln Navigator ReserveNashville16 replies0 helpful
2013 Toyota Prius — oil level drops between services with no puddle
I started measuring the oil level every few hundred miles and it is definitely falling between changes. There is no obvious puddle and I do not notice smoke. H…
2024 BMW i4 — rough idle disappears just above idle speed
Idle has a slight shake once fully warm, but 100–200 RPM above idle it smooths out. No major loss of power. Would you look at mounts, vacuum leaks, ignition or…
2025 Porsche Macan Electric 4S — need advice: Oil level dropping between changes — how much is too much?
I've started checking the dipstick every 500 miles and the level is definitely moving down between oil changes. No obvious puddles and I don't see smoke. At wh…
2018 Cadillac CTS-V — oil level drops between services with no puddle
2018 Cadillac CTS-V, about 95,500 miles. I started measuring the oil level every few hundred miles and it is definitely falling between changes. There is no ob…
2018 Subaru Forester — catalyst efficiency code but car drives normally
2018 Subaru Forester 2.5i, about 105,500 miles. A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire code…
2018 Mitsubishi Outlander — ticking noise follows RPM but fades when warm
2018 Mitsubishi Outlander SE, about 31,000 miles. There is a light ticking sound that follows engine speed for the first few minutes and then becomes hard to h…
1970 Datsun 240Z — catalyst efficiency code but car drives normally
1970 Datsun 240Z, about 254,500 miles. A catalyst efficiency code came back after clearing once.
2020 Audi Q7 55 TFSI — oil level dropping between changes — how much is too much?
2020 Audi Q7 55 TFSI, about 78,000 miles. I've started checking the dipstick every 500 miles and the level is definitely moving down between oil changes. No ob…
2021 Toyota Highlander — long crank only after filling the fuel tank
2021 Toyota Highlander XLE, about 45,500 miles. The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rou…
2015 Volkswagen Golf — long crank only after filling the fuel tank
2015 Volkswagen Golf TDI, about 51,000 miles. The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rough…
Oil level dropping between changes — how much is too much?
I've started checking the dipstick every 500 miles and the level is definitely moving down between oil changes. No obvious puddles and I don't see smoke. At wh…
TrackShopper30Community StarterOct 5, 20252022 Toyota RAV4 Hybrid XSEBoston / New England28 replies0 helpful
1990 Ford F-150 — catalyst efficiency code but car drives normally
This started as a small annoyance and I finally decided to track it down. A catalyst efficiency code came back after clearing once. The car drives normally and…
CX-5 turbo oil level drops before service interval
2021 Mazda CX-5 Turbo, about 78,000 miles. I'm seeing the oil level fall enough between services that I now check it regularly. No obvious leak. For other turb…
2007 Toyota Camry — single-cylinder misfire comes and goes
A cylinder-specific misfire code appeared after one rough start, then cleared and the engine feels normal. Plugs are not very old. Would you swap coils, inspec…