Hi All,I'm one of the new owners of E90 320i, year 2007 model with car mileage only is 42,000km, pre-owned by a 70+ years old company boss who only use as weekend car. Like new.I've read thru this forum for almost 3 weeks now whenever I'm free, from wheel, tire, mobility kits, and engine oil to every other thing. I browsed through all of the relevant topics I interest without missing any of them. Although I have some questions & conclusion my own, I don't want to spend time to post, partly because this forum has been less active recently, probably due to E90 is almost end of life. I guess I've decided to listen to all the E90 guru here. I'd appreciate your time to share your opinion & help.1- Engine Oil:I get to know E90 model from year 2009-2010 onwards was scheduled to have oil change every 12,000km instead of the previous 20,000km schedule, mainly due to AB know oil degrade after long mileage and the high engine temperature (due to E90 high compress ratio?) cause the gasket/O-ring etc degrade, result in oil leak issue. My car is okay, so far no sign of oil leak. I've decided to change engine oil every 10,000km at 3rd Party workshop. What oil do you recommend to use in my case? A 5 years old car, with low mileage. My current decision is Mobil1, 5W-50.2 – RFT:From what I read in the forum, many E90 owners switch to none RFT, mainly due to ride comfort and high RFT price. I'm one of them. So far I guess Michelin PS3 is one of the choices for me. In Penang, Michelin PS3 225/45/R17 cost RM650 a piece. Is this the right market price? I will do more survey in few other shops.I like comfort but don't want to trade off grip and safety. What other brand you've experienced and recommend?3 - Mobility Kits/ Space saver spare wheel:I need this for sure if I switch to none-RFT. I chat with one of the E90 owners at a car wash, who told me he know a workshop now can convert our E90 trunk compartment (the sinking/hiding compartment) to fit a spare wheel. I think that sinking compartment was originally design for spares. Have you heard of such thing? I don't think leaving the spare wheel (even tie up) is not a good idea to me.I forget to ask that owner where to install such thing and he just left. Do you know where can I buy the space saver spare wheel? From the forum, I know it cost roughly RM600 range.4 - Car BatteryThe AB SA told me the original battery from BMW cost RM1300 but outside shop cost significant lesser. Do you have any preferred brand to suggest? Price?Can our E90 give us pre-warning in the event of weak battery? Or it will just die without warning?5 - Car ServiceMost likely I will send my car for service at outside workshop, AB maintenance service cost is way too high. The AB SA told me oil change cost around RM1,000!?, whereas outside shop only cost < RM250 inclusive labor cost. My question is, beside oil change, there are many other things like air cleaner filter, steering fluid, brake pads need to be changed at certain mileage (can see from the car PC). If I change from outside workshop, can they reset my "Service" counter? If not reset, even after I've change the parts, it will keep showing a warning sign right?6 -Others:I still keep my old Pivot Voltage Stabilizer (Capacitor) and Pivot Spark Earth cable (from my previous Civic), do you think it is necessary to install such thing in our E90?Finally, anyone know which car detail shop in Penang region help people install the white LED Angel Eyes bulb? 6W? 10W? Price?Thanks in advance. Your advice would be much appreciated!!