Hi, been reading threads on oil since my Crossfire has been clic clic clicking more and more loudly lately, not certain if its the lifters, oil air frothing or exhaust leak , keeping an eye on it at 27,000 kms my 2004 is like new, maybe it sits around to much.

On the matter of oil, i think of it like coffee there are many blends with varying tastes when additives are added , the base product remains coffee beans, like esters. Many companies add a variety of products to produce what they think is optimum for their engines, example is energy conserving oils contain molybedenum as a friction reducer hence a different type of oil filter is necessary, motorcyle oils for example the clutch would slip with energy conserving oil, so lots of specialty oils out there that will do the job but if you want the best.
bacon fat would work but for how long is debatable!
:-)
Regards