Toyota recommends 87 octane for the 2025 Prius, but one owner hit 61.1 MPG using 91 premium. We analyze Jason Black’s ...
The fuel and engine community has been using Cooperative Fuel Research (CFR) engines for nearly a century to quantify a fuel’s “knocking” propensity, or the likelihood that it will autoignite in the ...
With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...
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