Hi Guys, just wanted to bounce some thoughts. I haven't seriously worked on cars for decades so I know I'm missing something.
Daughters 2007 Ford Focus with the 2.0L gas engine. It currently has 156K miles on it. She lives in another state and visits 2X a year. While she's here, I have been changing her oil. I have been putting in Mobil 5W-30 EP for the last few changes. Typically changing between 10 - 13K miles. At her last oil change, I changed the oil at 13K and did an oil analysis. Blackstone said run it 2K more and check again.
At 101K, I had the dealership replace the plugs, antifreeze, transmission fluids, brake fluid, etc.
So on this last oil change, her oil came out dark black with a sooty smell. This was at the 11K mark and after she drove 250 miles on I-5 to get here. I was really surprised as she drives mostly freeway and the freeway run to get here should have burned off a lot of crap. I replaced the oil with Mobil 5W-30 EP and now trying to figure out my next step. She's coming back for Christmas.
So my first thought was to change the spark plugs. Her OEM plugs last 101K and still looked good. So I ordered in some NGK Platinum plugs.
Now I know it's impossible to diagnose a problem long distance but wanted to ask what else would you guys be looking at?
Thanks
Daughters 2007 Ford Focus with the 2.0L gas engine. It currently has 156K miles on it. She lives in another state and visits 2X a year. While she's here, I have been changing her oil. I have been putting in Mobil 5W-30 EP for the last few changes. Typically changing between 10 - 13K miles. At her last oil change, I changed the oil at 13K and did an oil analysis. Blackstone said run it 2K more and check again.
At 101K, I had the dealership replace the plugs, antifreeze, transmission fluids, brake fluid, etc.
So on this last oil change, her oil came out dark black with a sooty smell. This was at the 11K mark and after she drove 250 miles on I-5 to get here. I was really surprised as she drives mostly freeway and the freeway run to get here should have burned off a lot of crap. I replaced the oil with Mobil 5W-30 EP and now trying to figure out my next step. She's coming back for Christmas.
So my first thought was to change the spark plugs. Her OEM plugs last 101K and still looked good. So I ordered in some NGK Platinum plugs.
Now I know it's impossible to diagnose a problem long distance but wanted to ask what else would you guys be looking at?
Thanks