Originally Posted by Mopar340

Havoline was the motor oil brand of Texaco service stations they been around for years till they were bought by Chevron in the early 2000. I still remember their gasoline grades Fire Chief and Sky Chief.

The only true way of evaluating an oil quality is laboratory testing where it show the various elements quantities in the oil such as MolyB, Titanium, Boron, Silicon , Magnesium, Calcium, Phosphorus also viscosity @212 degrees, cst viscosity and Flash point. Then the antiwear and detergent additives are added together for the total number the higher the better quality oil. Castrol Edge scored among the highest off the shelf oil available where you can buy it practically anywhere from dept.store to your local auto store and stocked in most independent repair shop.

Surprisingly the worst 3 oil scoring the lowest were Mobil 1, Mobil 1 ext performance and Motorcraft . These are all cat.3 oil which are considered full synthetic only in NA in Europe these are not considered synthetic oil their standards are more stringent only cat 4 and 5 oil are considered synthetic made from synthetic composition in a lab, Cat 3 oil are advanced hydrocracked in ground oil products.

Those who have experienced tapping lifters on their 3.6 pentastar with bad rocker arm and scored cam might want to check the brand of oil they're using could be one of those low scoring oil with less antiwear additives.

Originally Posted by IDon'tGiveARam

I disagree with two of your assumptions. 1. I used to use Castrol but they refused to disclose if any of their products where a PAO Group 4 base stock. 2. I then spoke with Mobil and they do disclose that Extended Perfomance 15,000 mile warrranted oil was a Group 4 base stock.

Castrol is the company who fought to allow Group 3 base stock to be called synthetic. That stinks of rip off and I will never do business with them again.

https://petroleumservicecompany.com/...ynthetic-oils/

When Synthetics Aren't Synthetic

In 1999, Mobil filed a complaint with the Better Business Bureau's National Advertising Division (NAD) against Castrol Syntec motor oil. At the time of the litigation, Mobil 1 was made using a PAO base stock synthesized from ethylene while Castrol Syntec, on the other hand, was comprised of highly refined crude oil. Mobil's complaint centered around Castrol marketing their product as synthetic, despite the fact that it was made from petroleum.

Ultimately, the NAD ruled that both Mobil 1 and Castrol Syntec had near identical performance characteristics, despite their differing base stocks. Further, they said Syntec was technically synthesized from crude oil because its molecular arrangement was unnatural a byproduct of an intended chemical reaction."

Originally Posted by Mopar340

Castrol Edge European blend is 100% synthetic POA and Ester blend only their NA stock is group 3. Mobil took Castrol to court over the issue and because Castrol won the case Mobil 1 oil are now selling group 3 oil containing no POA for the NA blend as full synthetic. Amsoil signature is POA based oil group 4 and Redline is an Ester based oil group 5. All oil brand in NA that labelled Full Synthetic is made from crude oil group 3. Unless you're buying a labelled 100% synthetic oil you're just getting a group 3 oil.

Originally Posted by IDon'tGiveARam

As far as Group 5 base stock goes these are somewhat experimental. They may be miles ahead of their time but I'm not sold yet. For instance the Dodge owners manual is pushing for Penzoil which has a synthetic made from synthesis of natural gas. It is great for the environment and is in fact a great idea, but like the CVT and direct injection which I spent a lot of money to get behind, I'm not willing to be the guinea pig for.

To clarify my 2013 Chevy Malibu started dying at stop lights with 60,xxx miles 2.5L direct injected, and my 2015 Nissan Altima needed a CVT at 85,XXX as did my mom's husbands and he drives like very slowly all highway. These technologies have potential and frankly a CVT is simple to rebuild if Nissan wouldn't sue you for doing so, but after several bad financial moves I'm not going to do things to my vehicles that are unproven (ignore my custom intake thread on this forum as I just have to screw around sometimes:-)

Originally Posted by Mopar340

Direct injection worked great in race cars were they run full throttle most of the time plus they're always tearing the engines apart. The problem with direct injection in a regular car is the carbon build up on the backside of the valves. New models now have both port injection and direct injection using port injection at low rpm and direct injection for higher rpm.

CVT are junk period Bombardier came out with that technology back in the early sixties on an invention call the Ski-Doo snowmobile same simple principle with a belt centrifugal clutch and variable pulley. Nissan gets these CVT from JATCO a subsidiary Nissan company which many mechanic stands for Japenese Automobile Trash Company. My brother had Nissan Murano with CVT it died after getting rebuilt he followed the advice of the technician and git rid of it and bought car with a real transmission.

Originally Posted by IDon'tGiveARam

I disagree with your assumption sir I know for a fact that there are pao North American synthetic oils. But you are free to believe what you wish.

Originally Posted by IDon'tGiveARam

My wife's Jeep transmission CVT was also built by Jatco and even Jeep doesn't have the same failure rate. I'm to understand that direct injection was in regular cars back in the 70s and 80s, and even longer for VW and the carbon buildup Su was well-known long before they decided to put that ****ing technology in my Chevy malibu. At least Ford had the decency to put a secondary injector behind the valves to clean them up and that few engines that they tried direct-injection on.