Engine oil RED LINE or AMSOIL

I use Amsoil full synthetic 15w-40 year round in my 1.6D with over 250k miles.

I've been running Redline or Royal Purple 40wt

Amsoil 20w50 in my 8-v 12:1+ 1.8 liter Rabbit Amsoil 5w-40 in my street turbo Jetta and track turbo Golf.

Using Redline racing 50W in a SCCA 1.6L production engine with an oil temp of about 210 to 215 degree (F) on a hot southeastern race weekend. Hot oil pressure is about 70 to 75 psi at WOT and about 30 psi after a session in the paddock prior to shut down.

I switched to amsoil 20w50 and the temps are down to 230ish

With the AMS and a 20 row cooler my temps stick at 190-200 dependant on ambient temps thus far.

For the past 5 seasons, I've been running 5w-30 Mobil 1 but recently switched to Red Line 30 Wt with no ill effects. Typical oil temps (racing on in the Mid-Atlantic area with temperatures and humidity in the 90s) are 250ish with 30-45 PSI hot oil pressure at full chat.

Stick with the synthetic. The tiny turbos on the TDI's are heavily stressed and mineral oils are just not up to the task of protecting the bearings in the turbo.

amsoil here too, right now 5w30 going to switch to 0w30 soon, best stuff for the $$$

Amsoil 10-30 my dad's an amsoil dealer