I’ve used three oils on my bikes since the mid-2000s: Motol 300v, AMS oil, and T6.
Out of the three, I’d choose T6 for normal street riding with the occasional adrenaline run
I switched to Rotella about 15 years ago after it worked good in an ej22 that was averaging a quart every 300 miles.
I had an 03 Camry from new till 2019. Had 335,000 miles when I sold it. That car got Rotella T6 5w40 since new. I still wonder how long that car would have lasted if I kept it.
Fixed many ls engines with excessive oil burning by switching them to t4 rotella 15w-40. The rotella t4 flavor of it is a fantastic oil. If you're engine has good oil pressure and isnt burning oil then theres probably no need to for it but its not gonna hurt a thing. Gen 3 ls engines arent some super tight tolerance engine, i probably wouldn't put 15-40 in a motor that calls for 0-20 but your 5.3 will not care at all.
He may be using it for the 15w40 weight for noise or lower oil pressure. I ran Rotella in my 94 F150 with the 5.8l gas engine because I bought it with a slight knock. After a while I dropped down to the 10w30 Rotella and ran it for year, lifted mud truck driven daily and in the woods on weekends. It will be fine, just get some clarification on why. I currently run Rotella 10w30 in my 4.2l Envoy.
I'm using mannol extreme 5 W 40, very good price quality.
Öl von Mannol (mein Favorit) 10l 5w40 35€
Mannol hat hohe Qualität und trotzdem noch sehr günstig.
Using Mannol for my diesel.
Mannol is cheap for a reason as you never know what you will get in a bottle.
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