Best oil to use in a VH:

[Mettler]

Yep, no doubt everybody has a favourite choice of oil for their engine.

Please state what you think is the best oil for a VH engine, and your reasons why.

[elwesso]

I prefer 10-30 for most useage... IMO theres no reason to use a 40 weight unless you hvae a higher mileage motor...

I use 5w30 in the winter and 10w30 in the summer...

[maxnix]

Depends on wear.

Personally, I use M1. Cams and vavle covers look great, don't they Wes?

[mtcookson]

Viscosity - Factory recommendations

As for brand, if you go synthetic, Mobile 1 seems to be a very good brand to go with from what I've seen. Castrol not so much on the full synthetic. Of course there's always Amsoil and Redline. A lot of Nissan dealerships seem to push Royal Purple, which I've not heard bad things about.

[carfrk666]

10w-30 castral GTX sludge protection or castral synthetic, keeps it clean, keeps it healthy, havent had a problem, heads and lower end look great.

[mtcookson]

The Castrol synthetic isn't really all that great as far as full synthetics go. From what I understand, they basically use a very low grade base stock. I'd definitely go with Mobile 1 over Castrol as far as synthetics go. For the regular oil though, I use the GTX a lot.

[David Steele]

Too bad moble one isnt a true synthetic and Castrol is.

http://www.g35driver.com/forum...43074

[elwesso]

Very good to know, I was thinking about picking up some M1 for an oil change but I guess I'll stick to something else.

[mtcookson]

Wow, they actually flipped. Good info!

[silver2k2]

They still claim that is fill synthetic on their site

http://www.mobil1.com/USA-Engl...FAQs4

What's the difference between a fully synthetic and a synthetic blend motor oil? All motor oils are made up of base oils and additives. In general, fully synthetic motor oils contain non-conventional, high-performance fluids. Semi-synthetic oils (also called "blends") usually use a small percentage of non-conventional, high-performance fluids in combination with conventional base oil. Back to top What's the overall benefit of Mobil 1 with SuperSyn Technology? Mobil 1 with SuperSyn Technology exceeds the latest industry and OEM requirements. It is designed for vehicles under warranty and will provide protection for the maximum oil change interval recommended in your owner's manual or by your oil life sensor.

The overall goal for Mobil 1 has always been to protect your engine, even under the most severe conditions, such as cold starting temperatures, extreme high-temperature operations and high-load conditions. Mobil 1 has been formulated with a performance reserve to provide you the peace of mind that your engine is protected during these severe conditions. But Mobil 1 with SuperSyn is not just for extreme service. You can also realize Mobil 1's benefits of improved engine cleanliness and extended engine life under "normal" service.

[David Steele]

They still claim that is fill synthetic on their site

http://www.mobil1.com/USA-Engl...FAQs4

What's the difference between a fully synthetic and a synthetic blend motor oil? All motor oils are made up of base oils and additives. In general, fully synthetic motor oils contain non-conventional, high-performance fluids. Semi-synthetic oils (also called "blends") usually use a small percentage of non-conventional, high-performance fluids in combination with conventional base oil. Back to top What's the overall benefit of Mobil 1 with SuperSyn Technology? Mobil 1 with SuperSyn Technology exceeds the latest industry and OEM requirements. It is designed for vehicles under warranty and will provide protection for the maximum oil change interval recommended in your owner's manual or by your oil life sensor.

The overall goal for Mobil 1 has always been to protect your engine, even under the most severe conditions, such as cold starting temperatures, extreme high-temperature operations and high-load conditions. Mobil 1 has been formulated with a performance reserve to provide you the peace of mind that your engine is protected during these severe conditions. But Mobil 1 with SuperSyn is not just for extreme service. You can also realize Mobil 1's benefits of improved engine cleanliness and extended engine life under "normal" service.

Too bad a Dynosuar oil outperforms it.