I was wondering, what are the typical viscosities of the base oils used in oils such as :
- Group III base low HTHS US 5W30
- Group III base high HTHS euro 5W30
- Group III base euro 5W40
- Group II/III base euro 10W40
- Group II or II/III HDEO 15W40
- Group I or II euro 15W40
- Group I or II 20W50
Is a euro group III 5W40 generaly using a similar base oil as the 5W30 version with just more VII? Is a group II/III semi synthetic 10W40 made from slightly thicker base oils than a group III 5W40? Thanks.
Edit : Also, what kind of VII loading to expect for each type of oil?
- Group III base low HTHS US 5W30
- Group III base high HTHS euro 5W30
- Group III base euro 5W40
- Group II/III base euro 10W40
- Group II or II/III HDEO 15W40
- Group I or II euro 15W40
- Group I or II 20W50
Is a euro group III 5W40 generaly using a similar base oil as the 5W30 version with just more VII? Is a group II/III semi synthetic 10W40 made from slightly thicker base oils than a group III 5W40? Thanks.
Edit : Also, what kind of VII loading to expect for each type of oil?
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