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Generally whatever non-FRAM filter is on sale at the parts store. Last few changes have been Purolator Pure One filters, but there are some Wix filters in there, some AC Delco filters...

Originally Posted By: Ramblejam Originally Posted By: JohnVitamvas it definitely turns some RPM Still running the stock 245/75/16 tires? Yes, Michelin LTX A/T 2 LT245/75/16 Originally Posted By: Ramblejam Originally Posted By: JohnVitamvas 75MPH is about 2700RPM. Really? 4.10 gears, 0.75...

Changing oils causes lead to increase?

No. As I said, some of these changes are with 5W30.

The 4.10s are standard on the 2500-3500 trucks. It's 4WD, so changing both front and rear R+Ps would be expensive and time consuming. 75MPH is about 2700RPM. It's a naturally aspirated gas engine, it has to turn some RPM to make power.

Thank you for the comments. Towing I average 11.2-11.4MPG staying around 75MPH. I've done a couple long highway slogs with no trailer and have seen as high as 13MPG. It's on its original transmission, which is a 4L80E. Pretty bulletproof transmission. Nothing special done to that, just fluid...

The last five oil analysis from my 2500HD Silverado. Engine is the LQ4 iron-block gas 6.0L V8. This truck is used almost exclusively for towing a racecar around the country, so lots of long highway slogs with a ~ 6,000lb load. It's a four speed auto with 4.11 gears, and it definitely turns some...

It's been more than four years, but I thought I'd follow up with this one. We still own this car and it's approaching 170,000 miles. Reliability has been excellent - it has really required very little work. The A/C compressor went out at 160,000 but other than that, just minor things like the...

Well, it gets a lot of freeway miles. She puts 24-26k on it a year. But it has an intake on it, and she likes the boost.

Not a correct assumption

Originally Posted By: Indydriver Where are the fuel % #s? At the bottom of the table. Buster, thanks for the answer. What oils have low VMs?

Sorry, but what are VM'ers?

I probably am waiting too long between changes - I guess it was never an issue with our old Jetta 1.8T (ran 10,000 mile Amsoil intervals on that car and every report was pristine). I have enough Amsoil for another change so I'll go 6k on this one, do another fill and see what the results are. I...

Guys - this engine has produced a lot of iron since new, but the lead coming up is a new phenomenon. Thoughts? This is my wife's daily driver. Mixed city / highway driving, but no particularly hard use. You can see where I switched from 5W30 Amsoil to 5W40 Amsoil. I did this because the engine...

Interesting. The coppers haven't seen much gap growth over the 30k interval - just some slight rounding of the electrodes. This is the girlfriend's car and when she comes in saying her gas mileage has gone from 32MPG on a tank to 30MPG I know it's time to change the plugs. That ends up working...

Yes again, sorry about the oil weight confusion. Posting before brain fully engaged apparently! Too many vehicles to keep track of and I just went by what the Blackstone report said. Duh. M1 10W30 is definitely the product in the case during all these changes. I run copper plugs on the motor...

Originally Posted By: JAG Edit: just saw that the OP discovered this was M1 10W-30! Wow, this engine does indeed seem to tolerate thin 30 weight oils, at least if driven on the highway mostly. I noticed this years ago but hadn't seen data for a long time to reconfirm it. Yes, mea culpa mea...

I'm sorry. I confused this oil with my other vehicle. All of these fills are M1 10W30. Sorry guys. I had to go back and check my records. The reason 5W40 comes up is because when Blackstone sends new containers the forms are pre-printed with 5W40 from my other vehicle's oil changes.

I'm sorry I wasn't clear. The first and third samples were probably 5W30, not 5W40. This particular sample was definitely 5W40, however. Could the issue with fuel dilution be that the sample was taken after only a short trip? When I do oil changes on this car it is typically started cold and...

Here are the last four oil analyses for our '02 Jetta 1.8T. Prior to this I followed a 5,000 mile OCI for this car, and we have always used either Mobil 1 5W40 or Castrol Syntec 5W40. Given that this car sees mostly highway miles (50+ mile commute each day plus numerous sales trips within a day)...