DATA POINT!
After a very good and direct conversation with a Factory Ford Performance individual, I was informed, against the stacked deck....that it would not hurt this car with the oil squirters to go to a 5W-30 or even higher oil....HOWEVER....this is where it gets good....unless I would be racing at sustained temperature for a sustained period of time, I may not NEED to do that....5W-20 is just fine.
He had seen racing engines ran HARD for a LONG time with 5W-20 oil with NO problems.....mind you where this is coming from. He was not giving the typical factory line stuff either....he was a knowledgeable and experienced professional who was giving advise as he was shooting the breeze to a guy who needed it.
The squirters are basically pin holes and a little higher viscosity wont affect it, I was told. T
Ford changed back and forth between oil squirters 3 or more times on the coyote engines, and not just in the 2011-2012 year. That was interesting. With forged pistons and rods the block is good for about 825 hp or so. Stock....624 hp is pushing it....thats a lot of HP he said with hypertunetic pistons and the factory rods. He told me not to go any higher, as if it dynoed at 705hp from the other guy and has a bigger open air filter its probably not on their factory tune.
Noteworthy is this: 20 minutes of full out road racing is when temps start getting higher and can need a different oil. Driving even 5 hours in one direction on the highway in 6th gear is nothing, even in warm weather. Driving in the 80's on the highway and doing some wide open runs 3-6th gear a few times for fun won't even affect it with 5W-20 oil, even top speed stuff....its the top speed stuff held there for 20 minutes plus that does. Even drag racing 6 full out runs at the track doesn't even come close.
Any oil cooler wouldn't hurt ANY car.....taxi's come standard with em. Changing the transmission and rear differential oil early isn't bad either.
So....thinner oil obviously flows better and carries away more dirt and contaminants out of our engines better too.
Oh happy day! Praise God!!!
So, I've decided to get an oil sample from this first change of the old unknown oil...send it to Blackstone Laboratory. I'm going to run Pennzoil Ultra Platinum 5W-20 with a WIX XP oil filter for the first two oil changes, and get my transmission oil and rear diff oil changed too. Car has 27k miles now.
I'll follow up with Data Points from the oil analysis.
Thanks for your willingness to help folks, I appreciate it.