Features:

  • Dramatically reduce engine wear
  • Leave critical engine parts 4X smoother
  • Add a layer of protection during warm-up and beyond
  • Cling to critical engine parts when the oil drains down
  • API SN; ILSAC GF-5; GM dexos1; Meets Ford WSS-M2C929-A; Meets Ford WSS-M2C946-A; Meets the performance of GM 6094M
  • Castrol recommends the use of Bosch oil filters
Should have stocked up on this

I have a Nissan Frontier which takes 5 1/3 quarts of oil with a new filter change. So, Inwas just a little short of the full mark and went to my local auto parts store to buy a quart. They wanted $10 for a quart! This was under $20 for 5 quarts. Can you say good buy? It’s oil, it’s Castrol and full synthetic. Worth every penny

Good oil for a good price.

Great price for full synthetic oil. Couldn't find a better deal at any local store. Amazon had this full synthetic for less than conventional oil at my local stores.

Excellent synthetic oil at a excellent price!

Absolutey happy with this product. It's great synthetic oil at a amazing price. Makes my honda pur with satisfaction every start-up! I plan to ritually purchase this 5 quart product each year moving forward, till I finally make it in the word and get a better car requiring more refined synthetic oil.

Great oil!

Solid oil. Not much to say. Didn’t make my engine tick or anything. I guess it lubes up my 2006 Ford Mustang V6 4.0L pretty well. My Mustang has 130,000 miles. Ford recommends 5-30W for my 06. It’s on the oil cap. After reading a few great reviews I was adamant to try this oil. I’ve used everything from purple oil to really cheap oil. All my cars have had 120,000 plus miles on it. None have had any issue with any oil I’ve used. This exceeded all my expectations.

The mathematician in me cannot figure out why this was ...

The mathematician in me cannot figure out why this was $19, and 6 single-quarts of the EXACT SAME motor oil is over $40.

Best Oil for your $

Does what it's supposed to; nothing more, nothing less. My car purrs after each oil change. I will keep buying and recommending it, as the price is very fair.

High quality stuff

So far so good!! Did a change on my 2010 Chevrolet Cobalt LT 2.2L with an automatic transmission. She has 110,000 on her and, after feeding her Castrol, she runs a lot smoother and is less noisy on startup. Amazing. Full synthetic is the way to go and Castrol is killing the game. Well done!!

Great value for full synthetic under $18

There is nothing critical I can think of to say here. Full synthetic oil for less than $18 which is not a terrible price for regular oil. I get this as a subscribe and save item and pay even less. I may not be the favorite house for person delivering this is the only negative I can think of.

This one is full synthetic and some other Magnatec's are blends.

I have used Castrol oils since 1970 and they always perform very well. BUT be careful with the Magnatec as now they supply both full synthetic with synthetic blends under the same name - really stupid. This 03057 is the full synthetic.

Auto technician has no issues wth this product

Just wanna start off that this is a genuine review, not fake. I've been an vehicle repair technician in the auto industry (both dealership and independent sides) for nearly 5 years now and I've never had an issue with Castrol products. I've used them in my Ford's 4.6L V8 engines as well as the GM 2.4L 4-cylinder and Chrysler 3.7L V6 Magnum ones . While motors oil is generally miscible regardless of the brand used (so long as it's the same viscosity grade), I have enjoyed Castrol's cleaning power and ability to lubricate the cylinder walls in my current vehicle. And to those who say their oil turns black after 3000 miles of use, please consider other factors including high vehicle mileage (for the engine's life, especially at 200K miles), carbon build-up, cross-contamination from old oil/ previous oil changes and burnt fuel from decreased compression values due to worn piston rings. Working previously for one of the domestic vehicle manufacturers, we were replacing full synthetic oil in vehicles @ 4000-5000 miles of use, regardless of the engine displacement and cylinder count.

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