Which one lubricates better? I'm running amsoil synthetic right now, but have heard Royal Purple "41" is good for high performance too. Just wanted to get some opinions before I changed my oil.

thanks
Rich

Also, what filters work well with Royal Purple? I know Amsoil has their own. thanks

 

5.7 kid will tell you amsoil. i use pennzoil or mobil 1 and have never had a problem. i think it's by far more important to keep the oil and filter changed than what you use.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

Amsoil is an excellent oil. I wouldn't change brands. I've got some info on it here:
https://www.thirdgen.org/messgboard/...ML/009917.html

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro