I work at a service shop that supplies Shell and Pennzoil products. I have used Pennzoil in my gas engines, and I have seen oil filters from previous services where Shell and Pennzoil products were used. Shell conventional oil is formulated to -control- and limit the formation of sludge, while Pennzoil conventional oil is formulated to =prevent and remove= sludge from the engine; the difference shows. For better cleanliness and engine performance in a conventional oil product, use Pennzoil.

Since I can Remember we have been using pennzoil either 10-30 or 10-40 depending on vehicle and weather temperatures, My father and i did our own oil changes at home and still duing it. When we lived in colder weather in the midwest we used 10-30 and when moved to Texas we have been using 10-40 on hot summer weather, on all our vehicles we have owned

[This review was collected as part of a promotion.] I have a Suburban with 240,000 on it and a Blazer with 208,000 and they both will be just off the full mark between oil changes. I use it in my mower,tiller and 8kw stand by generator and all run like a top. I just bought another Suburban and it will get Pennzoil. At one time I had a 71 Pro Street Vega with PENNZOIL in the pan. I am working on a73 Vega that will also get PENNZOIL Now with my job I even get to haul Pennzoil all over the USA .

[This review was collected as part of a promotion.] My dad would have been 97 this year. My childhood memories are the yellow quarts. He changed his own oil and had to have the correct grade for weather and temperature. Being the tom girl I was I hung out in the garage and watched/helped my dad. He was a fanatic with cars and taught me to ask for Pennzoil for my cars. I lost my Dad in 1990, I have saved some of his beloved tools that I was taught to use. I would love to win this tool box as a Pennzoil childhood memory to hold my Dad's tools. All oil is not the same Pennzoil every time! Still a tomboy and still insist on Pennzoil

In 2005 I bought a 2006 dodge ram 1500 hemi the first day I drove it to the shop an change the oil an put in 5w20 gold the reg stuff an here it is 10 + year later every 5000 mile I change the oil same stuff everytime now the truck has around 140 k on her an it run as strong as its every had thanks Pennzoil your tha best

[This review was collected as part of a promotion.] My dad has worked for a gas company named " The Hartley Company" they own many gas stations here in Ohio. I have grown up around all sorts of products, I'm sure you can imagine. However, I stuck with Pennzoil all my life. I have had many cars since then and still stand by the brand. I had a 302 mustang that I was Very hard on. After she wore out I made up my mind to rebuild her and the inside of her was spotless had no build up of any kind. Just to help out a little more this motor went through 4 transmission s before I tore her down.

I started using Pennzoil in 1966 for my car because my dad, an auto mechanic, used it. I am now 71 years old and have always used Pennzoil in all my vehicles, including lawn mowers, snow blowers, chain saws, etc. I have never had a failure because of oil, and usually get at least 150,000 miles or more out of cars. When people ask why I use Pennzoil, I tell them, for example, that I have always used it in my 15 year old lawn mower, it starts on the first pull and does not "burn" oil. I hope to get 15 more out of it!

I've used this oil for years and would never switch.

WORKS THE BEST ,USE ALL THE TIME , ALWAYS THERE WHEN I NEED IT

I have been using this for awhile now and just love it! I have never had any problems!! Will continue use for a very long time!!