Hi all,
First time poster, long time lurker.
My wife drives a 2014 Subaru Impreza. It has 95K miles on the clock, and we bought it new. Since new, I've done oil changes with Mobil 1 0W20, and a combination of Wix and Purolator oil filters, with both oil and filter changed every 7500 miles. 99% of her miles are highway miles, as she drives 300-400 miles a week on interstates, typically above 65 MPH unless there's a traffic jam. The only time the engine is not allowed to heat completely is every other Sunday morning when we drive 2 miles to church.
A couple weeks ago, the check engine light came on, registering a P000A fault. It's a slow camshaft response fault, and is usually caused by a faulty cam positioning sensor. Doing research on this, it appears to have been a fault with 2014 Imprezas, but ours has too many miles to have been the same issue. So I cleared it, it came on again, I took it to the dealer.
Dealer says that I have sludge in the engine. This clogged the CPS, causing the fault. I was mortified. I told him I changed my oil every 7500 miles. He asked if I had proof, and I did in the mileage book, but I had missed documenting one oil change, leading to a voided warranty, as one oil change appeared to have been done at 15K miles (funny how that just happens to be double every other interval, huh?). I'm also curious as to why it would be a warranty issue if it wasn't a known issue...
So, $600 later, I get the car back with a new CPS. A week later, another CPS trips the code, but clears the next day after a few drive cycles.
Guys, in a million miles in at least 10 different cars, I've never, ever had sludge with my engines. I tore down the motor out of my Oldsmobile (100K miles after I built it) and the oil pan looked squeaky clean. The old stuff gets dino oil every 3000 miles, the new stuff gets synthetic every 7500 or sooner, and they get new filters at every oil change.
Is this my fault? A flaw with the car? Something I can rectify by shortening the oil change intervals? Switch to a higher-end oil? My own DD is a 2011 Outback with 175K miles on it, with no CEL's ever. It's worked harder than her car for longer, with similar service intervals and no issues....
Any suggestions would be greatly appreciated.
First time poster, long time lurker.
My wife drives a 2014 Subaru Impreza. It has 95K miles on the clock, and we bought it new. Since new, I've done oil changes with Mobil 1 0W20, and a combination of Wix and Purolator oil filters, with both oil and filter changed every 7500 miles. 99% of her miles are highway miles, as she drives 300-400 miles a week on interstates, typically above 65 MPH unless there's a traffic jam. The only time the engine is not allowed to heat completely is every other Sunday morning when we drive 2 miles to church.
A couple weeks ago, the check engine light came on, registering a P000A fault. It's a slow camshaft response fault, and is usually caused by a faulty cam positioning sensor. Doing research on this, it appears to have been a fault with 2014 Imprezas, but ours has too many miles to have been the same issue. So I cleared it, it came on again, I took it to the dealer.
Dealer says that I have sludge in the engine. This clogged the CPS, causing the fault. I was mortified. I told him I changed my oil every 7500 miles. He asked if I had proof, and I did in the mileage book, but I had missed documenting one oil change, leading to a voided warranty, as one oil change appeared to have been done at 15K miles (funny how that just happens to be double every other interval, huh?). I'm also curious as to why it would be a warranty issue if it wasn't a known issue...
So, $600 later, I get the car back with a new CPS. A week later, another CPS trips the code, but clears the next day after a few drive cycles.
Guys, in a million miles in at least 10 different cars, I've never, ever had sludge with my engines. I tore down the motor out of my Oldsmobile (100K miles after I built it) and the oil pan looked squeaky clean. The old stuff gets dino oil every 3000 miles, the new stuff gets synthetic every 7500 or sooner, and they get new filters at every oil change.
Is this my fault? A flaw with the car? Something I can rectify by shortening the oil change intervals? Switch to a higher-end oil? My own DD is a 2011 Outback with 175K miles on it, with no CEL's ever. It's worked harder than her car for longer, with similar service intervals and no issues....
Any suggestions would be greatly appreciated.
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