Jun 28, 2017 · O’Reilly Full Synthetic is made by Omni. O’Reilly Syntec is made by Castrol. I believe this is true as well!

Apr 15, 2017 · Seems pointless to me. Nothing on the label explains why it's worth paying extra compared to the regular O'Reilly synthetic. Price-wise it's not a good value when whatever name …

Feb 18, 2024 · Remember Castrol Syntec? Castrol stopped using Syntec when Edge appeared, but to protect the branding I'd assume, they started making oil and labeling it Syntec for O'Reilly's. To the …

Jul 19, 2004 · I'm using right now Castrol Syntec 5w-20.I've used in the past Mobil 1.Are they both even in performance or does one have a better additive package?Thanks Joe

May 25, 2005 · I've been using Syntec 5w30 and Microgard Select filter in my wife's Fusion for a few oil changes now. Pretty happy with it... I used Magnatec before and this Syntec is quieter. WIX filters …

Nov 3, 2002 · 0w-30 cold cranking is better than 0w-40 cold cranking.

Apr 15, 2017 · 2. The SDS for Syntec 0W-40 shows Castrol Edge 0W-30, which would imply they are identical products. So if you wanted Edge 0w30 and a good oil filter you could get a sweet deal on it …

Nov 22, 2002 · My main complaint with Castrol Syntec is when they switched from being a PAO based synthetic (like Mobil 1 and Amsoil) to a Group III based synthetic, they didn't lower their prices to the …

Jul 19, 2004 · Castrol Syntec.. It seems we don't have alot of data on its performance here. Personally I think they are a little proud on price. Unless more data is gathered I would spend my money on the …

May 25, 2006 · Is Castrol Syntec really synthetic oil? The jug says full synthetic, but I read on various web sites that it's not a real synthetic. I wouldn't think they could state "full synthetic" if it wasn't. I …