Thread: Royal Purple 20w50 oil

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This subject comes up often here, when I put in my engine I was asking the same questions. I was steered towards an oil additive called SFR oil fortifier. It cost a bit, but you just add it to your oil of choice and it puts in stuff like zinc to protect your cam. No problems yet, and a lot cheaper than 9-13 dollars a quart. I was also using 10-40 and it gets cooler here than Simi Valley. 20-50 sounds a bit thick, but I don't know much about high performance engines, or racing engines. I bought a quart of it for about 32 bucks a few years back and still have half a bottle of it. It goes for $132.00 a gallon on amazon, but that will treat 128 quarts of oil. So that covers quite a few oil changes. It has zddp in it which lots of other premium oils use. You can read about it here. http://www.sfrcorp.com/product/sfr-1...oil-fortifier/