Castrol6144 Conventional Motor Oil, 32. Fluid_Ounces

I've used GTX for years (sometimes other sale brands) but this one said, 'synthetic blend' which I didn't order and hesitated 'synthetic.' Support said they just started labeling it that way but nothing changed for this 'Ultraclean' blend. Rarely do I notice a difference after an oil change, but this one was clear. I don't think I waited too long on old oil but I do think tht any new 'detergents cleared things up on this 170k mile car. I didn't suspect a compression issue but tested anyway and see that I still have a VERY solid reading. I expect this oil to keep and help that trajectory.

Thought it was ironic that my Briggs and Stratton 23 HP twin engine requires non synthetic oil, but this worked well in that engine.

No complaints. Have been using this oil for many years. Never been disappointed. Extreme cold weather in upstate NY and 100+ degree weather in Nevada. My favorite oil for sure.

LIKE the product, but dislike the fact that each bottle or container of the motor oil is packages and shipped s eparately thereby increasing packaging and shipping costs by the manufacturer or distributor

Love Castrol, good quality oil. Got a single qt, along with the 5qt bottle, to make a total of 6qts for an oil change. This 5w-30 is the Ultraclean, so it matches the 5qt jug.

Only the best brand oil in the market.

I love this stuff. Having it delivered to my doorstep was like christmas in July.

Good shape