I have a 1978 Jeep CJ5 with the AMC 304. The engine was freshly rebuilt when I bought it several years ago. I had used AMSOIL before and been very pleased with it. I switched the CJ to the AMSOIL Z-Rod 10W-40. The CJ is only used in nice weather, so it sits through the winter. The AMSOIL offer a great level of protection for vehicles that sees limited use and prolonged storage.

Love this for my vintage 1960s British car. Would one hundred percent recommend the Z-Rod oil to anyone who wants a little more measure of engine protection.

Use this religiously and my classic muscle car lower the operating temperature by 5° and the car ran much better will never use anything but their products in all my vehicles

I've been using the 10W-40 for two seasons in my 1969 Mustang and I watch the oil pressure gauge, especially when the ambient air temps increase beyond 80 degrees F. Oil pressure hasn't decreased since I started using it, even at sustained freeway speeds. I'm very satisfied.

Both my street rods have used Z_ROD oil since day one. They are not those "Kit cars' but real steel cars! You put that much time and money into you cars they only deserve the best oil!!!

The products were shipped in a timely manner, and packaged well. Will be ordering again when I need more.

Used this oil for the hydraulics in my SCAG riding lawnmower. The higher zinc is better for that application. I only use ANSOIL in all my applications.

Best brand of oil, I use it in all 3 of my vehicles.

Just what the whipple supercharged 68 Camaro needed. Using the best is what it needs!

Always Good Services and Fast Shipping Thanks...

Using this oil in my vintage English car. Wanted a high zinc oil to help mitigate wear on start-up since the car sits for a week or two between trips. The combination of extra zinc with a fully synthetic base is great. The start-up and running protection of this oil are fantastic.

great oil. I use it in my 351 cleveland BOSS with 671 BDS blower.

If your not using Amsoil you need to get onboard

Your products are always the best for lubrication and heat protection.

Z-Rod oil with the zinc in it is really the perfect job for my big block Chevrolet engine I like to protection I get work

I use this oil in my 1937 Ford Tudor Humpback with the original motor. This oil makes the motor purr like a kitten. I use other oil products in some of my other vehicles.

Nothing better

Perfect for our non catted cars

My vehicles all use Amsoil have out lasted all my friends vehicles of the same type and I have double the mileage

Great product with super fast shipping. Quick to respond to my tech question.