2003 Sable Duratec Coming up to 5k miles / 11 months on QSUD 5w30 and Bosch Premium. Everything is running great. I had been intending to do yearly oci's but the oil is nowhere near being black and it's seen 70% highway trips of an hour at a time. The dipstick is showing perhaps half a quart low. What say y'all about just topping up and going 2k more? Will the filter be ok? Top up would be with Synpower 5w30 although I could also use QSUD 5w20 (prefer to use the Synpower as it is an older open bottle) Factory oci is 5k / 6 month on Ford spec 5w20. I presume QSUD 5w30 exceeds those specs.