I am trying to decide between LiquiMoly Top Tec 6600 0W-20 and Valvoline European Vehicle Full Synthetic 0W-20 for my Jaguar F-Type R. I need an oil that meets STJLR.03.5006 and both of these do. I've used the Liqui Moly the past 3 oil changes and my Blackstone Analysis hasn't shown anything concerning, but I'm interested to know if one of these oils is generally better than the other. Does anyone have an analysis from a lab on virgin samples of either of these oils? The Valvoline seems to be a higher quality oil, but I'd like to hear some opinions. My car has 35K miles, is mostly street driven and I change oil every 2500-3000 miles since I've owned it. It does have a larger crank pulley and is tuned so I try and keep extra on top of oil changes. Thanks for any input.