The Brp stuff works well and is what book calls for. You can find everyone with opinions on different brands but I generally lean towards what the engineers who designed the engine recommend. Yeah spendy but you’re only doing once a season( usually) most places that sell the oil will have oil filters and oil filter seals, three seals per filter. If not amazon sells tune up kits with oil, filter,oil rings and spark plugs for about the same as piecing together.
Spark plugs NGK DCPR8E (ty Chester for catching typo) avail at most auto parts usually about $2-3/plug