Partial Synthetic Oil

Even mobil 1 calls themselves a full synthetic, but technically they are not.

 

I think "full" synthetic is also partial synthetic. Another way of saying it is, full synthetic is not 100% synthetic which is why they likely don't say 100% synthetic. Amsoil however is 100% synthetic.

 

Part of the price difference is likely because Amsoil is 100% synthetic while the others you list are less than 100% synthetic.

 

https://myoilbuddy.com/base-oil-groups/

 

I was going to agree that the U.S. is loose with their regulation of the oil classifications.

The article posted there is a good one and highlights what I always tell people. I learned this from some oil reps years ago when I worked at Advance Auto.

-“Customers, however, need to be aware that there is no standard requiring how much synthetic oil is blended with the mineral oil for it to be called a semi-synthetic engine oil. A synthetic blend oil could be 30% or 5% synthetic–or less. Therefore, the customer needs to weigh the cost-benefit ratio of using a semi-synthetic motor oil compared to using a mineral oil—or a full synthetic oil product.”


Semi-synthetics aren’t really worth your time. If your truck came with full synthetic, stick with that. If it didn’t and you’re strapped for cash just use conventional. Pretty much everything beyond that is superfluous.

 

That is correct.
However the Toyota product formula is specific to Toyota, you cannot purchase an identical product in a Mobil branded bottle.

 

I manage a shop. Pretty much everyone makes a synthetic blend in 0w20 now. I haven't seen the 0w16 that the new Toyotas are calling for in blend yet though. You can't call it 100% accurate but our system allows the 0w20 blend on Nissans and Chevys that call for it. It shows it does not meet the manufacturer's specifications when you try to put it on Toyotas though. Again, that's just our system and may not be what Toyota will say but I haven't had a customer ask for blend on a Toyota calling for the 0w20.

 

I’d stick with full synthetic. Why cheap out on oil?

 

Manufacturer recommends full synthetic . Never put anything else in the motor.

 

i would only use partial synthetic/maxlife in an engine that already leaks oil

 

Nothing wrong with these oils that are technically call a synthetic. Imo, they offer best corrosion protection on internal engine components if the truck sits long periods while being able to cling to those engine components. 100% synthetics are kind of known for being weak in that area.