My brother is bowling at a center that does not provide fresh oil,  they oil for the special olympics league in the afternoon and then there are open bowlers then league starts.  I bowled three years there under the same circumstances and also worked at this place.  I can tell you he does not properly maintain his lane machine, therefore old oil isn't completely removed before new oil is distributed.  This causes a pair of lanes to be drastically different in some circumstances.  The other problem is that old oil is being pushed to the pin deck causing a bunch of pin sliding issues.  It was a daily thing where a pin would slide off spot after being hit and not fall over stalling the machine.  These are AS-90 Brunswick machines, only a few years old, already looking crappy.  

 

I am a rev dominant player, above average speed and rev rate.  I would start the night with something agressive, progressively moving left.  Oddly enough into the second game at some point I would lose reaction and have to move back right eventually switching to a less aggressive ball.  My brother is struggling mightily and I think it's because of a lack of a lighter oil piece.  He managed a small 600 series after trying to come up the back of the ball more  and increasing ball speed like I suggested, but it's causing some old shoulder issues to resurface.

 

I guess I am asking two questions

1. What is the best way to approach conditions like this?

2. What would be a good light oil ball for him, I suggested the Silver Recon RX-1 from Motiv since I own one and have had good experiences with it.  But I am not to well read up on light oil stuff so some other input would be appreciated.  Thanks 

If the lanes are spotty as you suggest, the "straigher is greater".  The fewer boards you cross, the better off you will be.  User a hybrid coverstock ball as they seem to be less sensitive to oil breakdown/movement.  If you must cross a lot of boards, then I sugges you move deep deep inside to stay out of everyone elses used lines.  This will give you a cleaner shot to the pocket.  Be patient, keep the ball in play and pick up your spares.