BTW, I can see that "Bud" is going to be thirsty for oil... where can you buy phillips 66 by the case??? I thought Oil was changed at 50 hours??? at the rate "bud" goes through oil I think at 50 hours it will have already burned 10 quarts of oil!!
I use Aeroshell 15W50 and buy it from
Airplaneoil.com [
airplaneoil.com]. Even with shipping cost (I usually buy 2 cases at a time), it's still cheaper than I can buy locally. They sell Phillips 66 too. Also, check your local yellow pages for Oil Distributor. Sometimes they can special order it for you at no extra charge. I used to buy from a local distributor before they raised their price above the online price.
The 150 comes with an oil screen. It's a pain to check and clean, so most owners replaced it with an oil filter. If your plane has an oil filter, oil change interval can be 50 hrs (but should be at least every 6 months). If the plane has no oil filter and still uses the screen, I think the interval is 25 hrs. My 152 has an oil filter but I only fly 40-50 hrs per year, so I do an oil change every 6 months.