Engine oil RED LINE or Motorcraft

Redline user have been since I picked up my 04 WRX wagon two years ago. Auto crossed and rally crossed. Works great have had zero issues, also at 170,000 miles on the original engine and still running strong.

I use Redline, similar quality and price to Amsoil, without the MLM BS.

In my experience of trying many different oils, what I think are the best, as far as the engine running cool and smooth shifting are: 1. Redline 15w50

Red Line Racing Two Stroke is the best oil I've run. It leaves a good film and smells the nicest.

Full synthetic Motorcraft for my Shelby, Roush, SHO, and Focus 1.0 ecoboost.

Ford performance oil filter for the Shelby. Motorcraft for the others.

Why? I had a Ford tech tell me any and all problems they'd ever seen with a Shelby engine involved one that used non-Motorcraft brand in engine or filter.

I run 10w30 motorcraft because my 300 doesn't dry start as bad with it

Só compro óleo original na concessionária e da Motorcraft conforme manual.

I stand by Redline 5w20. Not that I have bad “hemi tick” on my 5.7 but I swear the valvetrain is the quietest when I use that oil.

I tried the redline 5w30 previously which has very high levels of moly (>800ppm) and the results were not as good as the moly-less 5w40.

Engine was noisier with the mix vs. the previously used redline 5w40. Iron levels are up at 6.3 ppm/1000 miles Oil usage increased by 1/2 quart over the redline 5w40 TBN/TAN levels are worse than 5w40 at comparable mileage