I’ve used Rotella T5 10w30 synthetic blend in some of my OPE in the past. Nowadays, it’s cheaper just to run ST 15w40 Full Synthetic. My pressure washer and mower stopped burning oil once I moved up a grade, which I grateful for.
last change in my wife's accent and daughters mkx I used Duron shp 10w30 which is a blend .
I think this is the best the accent has ever ran its a normally a noisy enough engine seems to be much less mechanical noises But maybe that's just me ?
As for the 3.7 in the Lincoln I swear you could almost run water in this it never seems to vary no matter the oil used .
had the same same results in a 2012 mustang 3.7 one of the better engines I have had.
Tried 10w30 Rotella T4 in my Chevy 350 flat tappet cam engine. The Rotella had better hot oil pressure at idle than the current Valvoline 10w-30 VR1 I have in it now.
The cam still has all of it's lobes so I guess both oils are working. 10 psi hot with the VR1 does not install confidence. Pressure was closer to 20 psi with the Rotella.
Delo XLE and VPB 10w30 have both been in the Impreza at various points. Impreza is getting all the oil I’ve acquired over the years just as a cost-savings measure since the newer vehicles all get HPL.