I’m currently using the 20w-60 ten tenths and found this to keep fantastic oil pressure at high temperatures. It also runs my engine cooler than other oils I’ve been using. Even tho I have a built racing engine the one thing I have found is that the viscosity at high temp has little loss and the oil still looks as good as new after each race meet. I highly recommend this oil.

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.

I use racing 10 in my s13 Race car and early on in its development we had cooling issues (rad was too small) and the Penrite racing 10 held up perfect even in extreme temperatures, Now we have car sorted oil temp and pressure is perfect. Also the fact it is a true synthetic oil makes it a no brainier for my car.

Using the 10W60 variant in my turbocharged 626 (was using 10W70 before being discontinued). Lifter noise non existent. Builds pressure quickly and maintains during extremes of operation. Blown head gasket and head was perfectly straight afterwards, some of which I attribute to the properties of this oil. Can't review it here but my wife is using another synthetic Penrite product and has negligible compression loss after 280,000KM of use.

I used to be a Castrol user but Penrite products seem to result in quieter engines with less wear. Being Australian owned is a side bonus.

Been using the racing 10 on my 1993 R33 gtst with 300 rwkw for years. I've owned this car for 14 years now. Used to use that French brand but not anymore. Keep up the good work Penrite. What a way to Support An Australian company and get a great product.

My fireplace needed new cams at 100000 klms and 8000 klms later my mechanic informed me that the new cams were showing slight signs of wear.he suggested using a oil with high zddp zink.within 30 klms after changing to 10 10 ths racing 10 I noticed a huge difference in power and economy.thank u penrite.

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.

By the way I love your racing 20 # 20/60 oil, it's one of the best 100% PAO & Ester, full synthetic oils I have used in a long time. My hq Monaro loves it and I use your 10/40 in my vy sv6. I have used redline amsoil torco used them all Penrite it's as good if not better as for the price very good value for your money just know this "Good oil is not cheap and cheap is no good."

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.