I'll do both. Doesn't centre when in neutral. Still learning to get her into 3rd from 2nd. Haha.
I'll do the oil as well just to cover that off as well.
She's only done 50k. But she is 14yr old.
Well why didn't you say that...... haha
OK, so not centering in neutral is a fairly easy fix, actually. If you're anywhere near Grimsby, North East Lincolnshire and want some help I'm happy to lend a hand.
You may need to remove the battery and battery tray for better access to the top of the gearbox for this. Easily done, it's just bolts!
So, have a look on top of the gearbox, in towards the middle of the car where the gearbox meets the engine and you'll find the selector cables.
The selector cables clip into a metal bracket on top of the gearbox and the ends of the cables then clip on to some actuating levers.
You'll see one of the cables - the rearward of the two I think - clips into a lever that runs on a bolt / rod through the bracket that it all connects to. On the other end of that rod is a finger that turns your left and right into an up and down motion for the selector forks in the gearbox.
Should look just like the attached. The pic is of an Alfa 156 actually but they're all the same design and this is a really clear pic.
You can see the rod with the ball pin on one end and the lever going off bottom right to the selector fork.
If you reference the bottom right of the pic you can see behind the nut that secures the lever to the forks there is a black plastic washer on the pivot pin.
They are a top hat shaped bush - there is one at either end.
Chances are these top hat bushes are worn and causing your stiff selector issue.
I'm pretty sure they're exactly the same as the Alfas and replacements are widely available for them for just a couple of quid but I wouldn't want you to spend your money and me be wrong! Replacements are hard to find listed against a Stilo.
A lot of people simply remove the plastic bushes to be honest. Take the pin / rod out. Clean the hole the pin runs through, clean the pin, apply a metric feck ton of grease and reassemble.
The bolt / pin and lever arm etc are all keyed so it's not like you can stuff it up reassembling and get it out of alignment or anything. It's all simple stuff. The selector cable itself will just unclip from the ball pin with light persuasion from a screw driver.
You may get away without battery remove and maybe just intake pipe removal, depends how skinny and bendy you are. I'm neither so I just take the new mins to give myself the room. Might be easier as I've never tried it on a 1.8 Stilo.