Royal Purple 51520 API-Licensed SAE 5W-20 High Performance Synthetic Motor Oil - 5 Quart, (Model: ROY51520)

My first try. I have read all types of reviews on Royal Purple and this was my first attempt in my Ford V8 4.6 I have ran penzoil full synthetic a great oil, and I drive about 60 miles home in the Colorado mtns. 5k to almost 10k elevation gain of around 5k, and have consistent mileage and I don’t go easy except to slow down for the occasional city Subaru. This was my only change and I’m now getting up to a 10% increase in mile/gal. And quiet engine run 130+k on my engine I can say this was my only change in my car not my driving! So far impressive I am hoping to also clean up the internals of the engine as that is a common feature for Royal Purple, I don’t know for sure on that but mileage increase I can attest to, I believe it is the reason.

Oil you can trust.

It quiets minor engine noise (does NOT have a hemi tick issue) and also flows faster during cold starts. My Hemi never sounded better. In fact it's so quiet I'm amazed! I used to use Valvoline Advanced Formula full synth (excellent product too) but I decided to try Royal Purple based on rave reviews. I couldn't be more impressed and happy with this product.

Good price. Less expensive than auto stores

Great product I change my oil every 3,000 miles and have used this since the vehicle had 47,000 miles just recently did some upgrades to the engine and at 136,000 miles the inside of the engine is super clean.

On time and great quality

Been wanting to try Royal Purple for a while and finally gave it a shot in my daily driver. Engine feels a bit smoother, and startup noise is a little quieter than usual. The deep purple color is a nice touch and makes it easy to see the oil level when checking or pouring. Shipping was fast, but the bottle had a small scuff on the cap — didn’t affect the seal though. I keep this quart mounted in my truck using the TripleD Tools Oil Dock, and it’s held in nice and snug. No sliding around and always ready when I need it.

I have been using this oil in my 2017 Ford F150 since I bought it in 2018, I used it in other vehicles before. Yes it costs a little more than other oils but to me it seems to be a better product. My engines haven’t given me any issues with this oil, and even changing my oil at 5,000 mile intervals the used oil is still sometimes purple instead of black. Ordered it from Amazon because it was cheaper than my local stores.

This is the best synthetic I've used to date. Slight power gain, engine idles smoothly.

Excelente producto

I have used Royal purple for a number of years. It has a significant advantage over any conventional or semi-synthetic oil. Cold weather starts are easier in winter and I have had no problems with hot weather operation.

De lo mejor. Un poco raro que sea morado pues se confunde con usado pero eso es solo estetico

I've relied on Royal purple for years in all my vehicles, well worth the price if you want to keep you vehicle for a long time.