Before I ever added hBN - specifically Archoil AR9100 ( nano potassium borate, hexagonal boron nitride (hBN), tungsten disulfide )to my RX-8 I measured the engine braking. From engine braking in 3rd gear down a mild hill at the same speed and then swinging into a left turn, before Archoil AR9100 the car was at 20mph and after 23mph. 0-60 improved by 0.1 seconds. I have a lightened flywheel so that probably increased the effect. So friction was reduced enough to measurably reduce engine braking and my guess aid motor rev up to redline. That effect stayed through an oil change, so I don't know that you'll be able to do a comparison. That is also assuming that friction reduction also resulted in a wear reduction, which doesn't necessarily follow but I'd bet money probably does (an additive could reduce friction but then cause extra sludge at the tail end of a oil interval for example by interfering with other oil properties)....also it seems Ravenol includes tungsten already.
IMO I don't care if it doesn't reduce wear (although the only two UO analyses I ever did came out great with both Liqui Moly Ceratec and Archoil AR9100, and I did 30k mile oil changes on the RX-8 and 15k on the Mercedes SLK320 - 36 and 18 months). Mobil 1 0W-40 synthetic previously on the SLK320, assorted dino and synthetic blend frankenoil discards in the RX-8 as that car uses/injects oil by design into the combustion chamber.
It measurably reduces NVH in both vehicles as recorded in the Bosch iNVH app by others and subjectively noted by myself and my wife who wasn't told about the additive. Fuel usage was reduced by 1% in my wife's car which was very easy to track as she used a fuel delivery service, and also easy to calculate on the RX-8 because of its terrible gas mileage. Our driving style on those two cars is momentum driving "bat out of h3ll" so of course YMMV.
Maybe it won't improve over your Ravenol, but Ceratec did improve on a some "regular" oil fills both franken-synblend-dino and 0W-40 Mobil 1 synthetic for me.
IMO I don't care if it doesn't reduce wear (although the only two UO analyses I ever did came out great with both Liqui Moly Ceratec and Archoil AR9100, and I did 30k mile oil changes on the RX-8 and 15k on the Mercedes SLK320 - 36 and 18 months). Mobil 1 0W-40 synthetic previously on the SLK320, assorted dino and synthetic blend frankenoil discards in the RX-8 as that car uses/injects oil by design into the combustion chamber.
It measurably reduces NVH in both vehicles as recorded in the Bosch iNVH app by others and subjectively noted by myself and my wife who wasn't told about the additive. Fuel usage was reduced by 1% in my wife's car which was very easy to track as she used a fuel delivery service, and also easy to calculate on the RX-8 because of its terrible gas mileage. Our driving style on those two cars is momentum driving "bat out of h3ll" so of course YMMV.
Maybe it won't improve over your Ravenol, but Ceratec did improve on a some "regular" oil fills both franken-synblend-dino and 0W-40 Mobil 1 synthetic for me.
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