most of the synthetic oils meet HTO-6 standard, but unfortunately testing process and certification cost a lot of money, and most of the manufactures do not want to spend a lot of money to capture very small market of RDX. On top of that, they know that even if they get HTO-6 certification, most of RDX owners will still continue using Mobil1.. so its a bad business decision for them...
1. 2001 Acura 3.2 CL Type S (SOLD)
2. 2008 RDX
i never used mobile 1 in my entire life since i have always read bad things about them online from engineers. same for castrol syntec which i have heard is not really synthetic and it is petroleum based. i did not even know petro canada maakes motor oil. whats your experience with it?
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