You're already mixing old dirty oil with the new oil anyway. Even if you do change the filter there is almost an entire quart of old dirty oil that you cannot drain left inside the engine. It's hard to argue with the specs:Have to say changing the oil but leaving the old filter on is like taking a shower and putting on dirty underwear afterword.For $5.00 or so why bother leaving on the dirty one? I know it's not filled with dirt but it's still dirty
.
You're also mixing dirty oil (which your changing because it's not good anymore??) with new oil, that doesn't make sense to me. Whatever floats yer boat but that's my take on it.
5.18 qt - 4.23 qt = 0.95 qt. of oil left behind. The filter only holds another 0.21 qt of oil.
(all FJR1300 engines have the same oil capacities)
[edit - damn Ross beat me to it while I was copying and pasting pictures he was typing it in]
Last edited by a moderator: