Owner reviews for engine oil

I have used Mobil 1 for years in Volvo diesel cars, and they are known for cylinder wall wear, of course its a VW Audi engine. With using Mobil 1 5w30 over several hundred thousand miles, I have seen zero wear and have not needed to adjust the valves once, in several engines. I am convinced it works well.

AMSOIL was my race sponser, and I've used their products in all of my racers including the SC'd 2000 4Motion. That being said, I wouldn't recommend running any engine oil ; including high-grade synthetics, over 7000 miles.

My favorite is simply Castrol drive hard. I run it in all my engines except the VR.

I used mobil 1 5w30 when I did the 10K oil change as well.

i use amsoil 5w30 love it

Hey I've got 145K miles all but the first 5K on Shell Rotella T from Walmart. I go 10 to 12K between changes and I'm running Big injectors with the IQ dialed up. No Probs...

My '03 jetta tdi just turned 84000, I have used the rotella synthetic 5-40 the whole time. I change it about every 7,000. I'm in the northeast. Last year it got down to 10 or 15 below quite a few times. It sounds like someone shaking a buckets of marbles when I first start it, but it smothhs right out and allways starts. Rotela is ok by me.

i use valvoline 5w 30 and it hasent done me wrong...yet

I also have a 2.0 and run the valvoline synthetic. I started after 2500m and am currently at 29k. No scientific results here other than keeping track of mileage in a little notebook and looking back at the first month compared to the most recent - I'm averaging about 7mpg more.

All these problems are not present in the Valvoline SuperSynth 5W-40 sample. Furthermore, the results from this Valvoline are well below the Universal averages for this engine. This suggests that I should be able to run this oil for at least another 1000-2000 miles and still get an excellent report out of it! With it, my engine runs bit smoother and quieter especially at idle. At high engine speeds the engine feels more responsive and more lively. Another difference is that with Valvoline, I am observing improved efficiency. My 2.0 broke its own record of fuel efficiency: 34.3 miles to the gallon on high way. The improvement is 3.3-3.9 miles per gallon compared to Mobil1.