I have a friend with a Suzuki Carry van. It is due its annual service.
Has he looked after the parts list from before? Of course not. So once again we get the choice of oil filter and plugs.
Oil filter, two sizes. I told him he needed to crawl underneath, not difficult, no need to raise the van, and read manufacture and part number off the current one. Had to be told three times, while he kept trying to choose on price on Euro website instead. Having the cheapes one, that leaks immediately, is not a saving. Having it on my drive, with no oil filter, and Euro being a 90minute return trip, tends to delay finishing the job somewhat. At last, filter determined.
I'd already linked to the correct plugs, NGK same as OE. But then he wants to complicate that too, by trying to choose between two Bosch alternatives, with no determinng detail, or NGK palladium ones. FFS, just get the ones I linked to.