I used to use valvoline synpower and found the engine used to get very loud lifter tick but after switching to ten tenths penrite the lifters are completely silent. One time the temp gauge got to 100c from idling too long and needing a new fan clutch but the lifters stayed completely silent even with the extra heat on the oil i did not notice any difference in sound or any oil burn as it held up to the heat. Does not burn a drop of oil even with continuous full throttle acceleration.

Using this on my BMW 528i In-line 6 cylinder, upgraded from 10W50 HPR. Engine is smoother and much quieter with no top ups needed until after 8,000kms. I now change engine oil every 7,000 kms. Have tried other oils, Shell, Everyday plus, Castrol and they are all noisy and require constant top ups from burning. First class product, will keep your vehicle running tip top. An oil test is determined by what comes out at oil change time, if there is a better oil than this I have not tried it yet.

Began using this nectar of the automotive gods in my 2002 Hyundai Accent LC Mod only ago at oil change, and all I can say is: What the heck. I can't believe I am actually driving what was called a plain and simple people mover with economy in mind.
Have noticed much quicker and quieter cold starts, and the engine is responding more like an electrical motor. This fully synthetic oil is ideal for high compressions my baby is reaching.