Owner reviews for engine oil

Running Mobil 1 15-50. This is my 'cue' to relax when on the track.. I run 260-280F all day long...at the track (LRP and Watkins Glen)

I ran 15w50 for a year, and my car ran at least 10 degrees hotter all the time, than when I switched to 5w40.

I am the person who posted those Valvoline 5w-40 vs. Mobil 1 10w-30 results long ago and started spreading the word about this oil and where to find it. The results show that the Vavloline 5w-40 is a very good choice for this motor. The last sample had nearly 9,000 miles on it, and the oil was well within viscosity and oxydation tolerances for 5w-40, and labeled suitable for continued use. Further, after 9,000 miles, wear metals were very low.

I've been on the Vortex for quite some time and remember several years ago a Vortex member sent in samples of used oil from their VR6 to a lab for testing. They used Mobil-1 Tri-Synthetic and Valvoline SynPower (both in ~4000 miles) in the same engine and sent in the samples. It's been so long ago, I don't remember the specifics on viscosities etc., but I do remember how Mobil-1 did not hold up well at all compared to Valvoline. In fact, it was stated in the results that after 4000 miles, the Mobil-1 sample was unusable.

For your hi-mileage IDI w/ 'consumption' fever, stick with the 15w-40, probably in a dino, and add a qt of synthetic same wieght same brand, at change You will get the lubricity of the snythetic for fraction of cost.

Wear values perfect ! Looks like Redline is lowering the Moly value some . Your nox is normal but new plugs or wires could help lower the values, Oxd is elevated by cleaning effect of the POE base and lab equipment hates Redline, no problems though. Second change on this oil will drop OXD values. As I said before I have not seen this formulation before but it looks ROCK solid. Good TBN retention.

Mobil 1 0W40 European car formula.

I run 0w40 Mobil1 year round. I used to use 15w50, too thick for me. Car runs a bit cooler (oil temps) and revs easier with the 0w40. In the cool months, it gets up top nice and fast. No problems, I like the stuff.

I work at a dealership, and they use Mobil 1 TriSynthetic 0W-40 from the factory for Porsche... so that's what I use.

I use 20w50 in the summer, and I just put in 10w30 for the winter...car starts up much better afterwards...oh yeah, I run mobil1 full synth