There is an Isx here, not mine, a company truck. The oil usage was not as big a deal as messing up the DPF system. Repeated clean outs and then the canister is cracked and not under warranty( $5.000 ) Restore did not fix it and it was overhauled. I was told under warranty but I see no paper work. This one did not make 300,000 and you left out Restore cost about $60 per gallon.