Is anyone on here running the HPL (High Performance Lubricants) Premium Plus 5W-30?
I am considering this, or the slightly less costly with a membership Amsoil Signature Series 5W-30.
They are very similar oils but the HPL has more Group 5/esters in it, and a slightly stronger anti-wear/anti-friction additive package, along with a higher starting TBN (total base number), and most claim a lower NOACK volatility percentage than the Sig Series' already low, published NOACK percentage.
I am considering this, or the slightly less costly with a membership Amsoil Signature Series 5W-30.
They are very similar oils but the HPL has more Group 5/esters in it, and a slightly stronger anti-wear/anti-friction additive package, along with a higher starting TBN (total base number), and most claim a lower NOACK volatility percentage than the Sig Series' already low, published NOACK percentage.
