lending one's car for monetary consideration is illegal.  in this situation though, a gentlemen's agreement sealed by a handshake and trust, must be honored (that's what we were taught isn't it?).  it may not immediately be settled here in doha , but for sure, a different scenario can always be think about when both of you goes home in the philippines (that's inevitable of course).  and by that time, i'm sure, unwritten rules may rule.