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I am opening a case with MB. I am certain it's not Biodiesel as my station is a large commercial bulk supplier. They have diesel pumps right next to biodiesel and he is an ethical guy who got burned with rotting biodiesel a few years ago. I will say that my oil turns black really fast. This is...

To answer some of the questions, the first sample was taken when I purchased the truck @16k. The vehicle was in pristine condition. There was a short oil change after I bought it (~4k miles) which I did not get tested. The second test showed zero TBN, which I verified with Blackstone. It was a...

I bought this truck used in Sept '13. It was two years old with 16k miles on it. My wife uses it primarily around town, a lot of short trips and her drive to work is only 1 mile. However, we bought it primarily to drive from Chicago to Denver and visit our children. I have seen very high Fe...

I have a '01 Jetta TDI and heard through the TDI website that Valvoline MerconV Full Synthetic is compatible. I contacted the Valvoline tech line and they agreed that it meets the VW spec. I have run it for 35,000 miles and it shifts great with no problems. Plus it is ~$5 /qt. It is also...

I have them on my wife's '01 musyang and they got caught in a snow last year and did as expected. I would give them a B+. But on dry / wet roads they are awesome! I am a driving instructor for the Audi Club and give them a workout all them time. They are a great tire for your car. the handling...

i have these on two trucks, a '99 Chevy Blazer with ~40k on them and a '04 Avalanche with 30K on them. the ride is quiet and smooth, wear is even and on the blazer I have at least 20k left on them, 30k+ on the Avalanche. Snow and mud traction is wonderful. they made it though Colorado Blizzard...

I use MC 5w-30 in my Avlanche 5.3l and has had the lowest wear numbers. even as compared to PP and significantly better thn M1.I have never tried Walmrt Full Syn.

I use it all the time on my 04 Avalanche. I drive about 3-4000 miles per month, I start to plan an oil change when it gets below 20% remaining. For my driving this is around 8000 miles depending on useage and weather. I have been doing oil analaysis and with a synthetic (PP) i still have a 2-3...

I got the deal of the century when visiting the Ford dealer to pick up my wifes Mustang. It was a $15 MC oil change with MC filter. Normally I used synthetics because I drive about 1000 miles per week. But, I was curious how it would run in the Chevy, based on all great results I got in the...

Interesting post. My local quick lube uses Superguard with Champion filters. my son's '99 blazer has 150K on the speedo and will need an OC as it has 5000+ miles on the oil. i will get it tested and report it here too. Interesting oil.

I use an old fashioned antique "hook" style can opener. It works great and is faster thana saw, doesn't leave filings and was cheap ie. free.

I have the same car and race it too. I have always used a xW-50 oil. Specifically, I use M1 15W-50 or Amsoil S2000 20W-50 Racing oil. The latter lets my engine run much quieter especially after a hot track run. I definitely prefer it. I have not tried RedLine but think it would also perform...

I have an '04 GTO. After seeing posts saying that the LS1 liked a heavier oil, I used 4 qt's of M1 5W-30 and two qt's of M1 15W-50. It resulted in consistent rod knock. I switched out to M1 5W-30 and have not heard it since.

One issue you never covered were the driving habits as this is your wife's car. My wife has an 01 Mustang GT. I run MC 5W-20 and it will have significantly higher wear metals in the analysis than other vehicles I see here. I have come to the conclusion that her driving habits are the culprit...

I too have a 99 Isuzu Trooper 3.5L. A great truck, we call it the energizer rabbit. At 100 K it went from 1 qt / 3000 mi to about 1 qt / 1500 mi. I tried a double bout of auto -rx and it significantly increased consumption to 1 qt every 300 mi. I tried DELO for several oil changes and it did not...

I agre with you guys on cleaning it first. I never cleaned it and it has 105K mi on it. I also have a Blazer without "fly by wire". I clean that one every 30K or so. You can feel it binding. With an electronic set up, you won't feel anything and I can see how it could screw up the ECU and send...

Some clarification here. The amsoil had a 1/2 qt makeup with a filter change at 5500 mi while the GC also had 1/2 qt make up with the 5500 mi filter change, but also needed an extra 1/2 qt. in the second half of the 5500 mi filter run. So 1 qt total was added in the 5500 - 11000 mi run. I towed...

I have just completed a 11,300 mi run on GC and thought it would be interesting to post as I have run a couple of Amsoil 5W-30 analysis. Columns are GC 0W-30 / Amsoil 5W-30 Run#2/ Amsoil 5W-30 Run #1 Mi on Oil 11,300 / 11,500 / 12,000 Mi on unit 104343 / 93,060 / 77,000 Al 2 / 2 / 3 Cr 1 / 1 /...

I have run into an intermittent problem with the 1999 landcruiser. After I tow a 5000 lb trailer a fair distance; turn off the motor and try to restart it. I get a P1121 code, the throttle will not respond (it is a electronic throttle). Sometimes it starts, other times it will fire then shut...

Here is the info on my last two tests. The first is over 9 months and 12,000 miles. Lots of short trips 3-5 miles (soccer mom had the truck). The second is 95% highway, long trips and 11,500 miles over a time period of 3 months. I inherited the truck and now use it for business. I drive 75 - 85...