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Royal Purple 31520

High Perf Street 5W20

Royal Purple 31520

Part Number: 831-31520

High Perf Street
  • 5W20
  • 1 Quart
  • $8.30
    Made In USA
    Royal Purple 31520 High Perf Street 5W20 $8.30


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    Royal Purple HPS street motor oils offer several reasons and advantages to maximize performance in your gas or diesel engine. How about reduced heat, friction and wear on your engine? Or, improved fuel economy, lower emissions and longer engine component life? High performance street oils can even help on mornings when you've got to cold start your engine! Royal Purple HPS is fortified with advanced additive technology - zinc/phosphorus anti-wear additives and Synerlec - to surpass many other oils. Increased pressure is met with increased viscosity to meet the demands of your modified engine with a higher level of performance and protection.

  • Elevated zinc/ phosphorous content
  • Ideal for flat tappet valvetrains
  • High alkalinity for extended life
  • Outstanding film strength
  • Exceptional oxidation resistance
  • Proven horsepower and fuel economy benefits
  • Additional Information

  • 31520 - Royal Purple HPS Street Motor Oil is rated 4.739130434782608 out of 5 by 23.
    • 2016-09-27T08:22CST
    • bvseo_cps, prod_bvrr, vn_cps_3.4.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_23
    • loc_en_US, sid_10001_10001_1645360, PRD, sort_relevancy
    • clientName_jegs
    Rated 5 out of 5 by from Made My '99 Honda 5-Speed Smooth As Butter! Royal Purple recommended HPS 5w30 as a replacement for Honda manual transmission fluid, so, at 255,000 miles and no rebuilds, I gave it a shot. Now mind you, my bearings are shot, so obviously there was still going to be some noise, but the noise was noticeably quieter. The big difference was in the feel. It was stubborn shifting into certain gears without grinding, and did not like reverse at all. After changing my manual transmission fluid with Royal Purple HPS, it shifted like butter, and have had absolutely no issues whatsoever going into reverse. Expensive, but the added performance is well worth the cost, especially at higher miles.
    Date published: 2015-10-01
    Rated 5 out of 5 by from Runs quiet!! As a carmechanic for 27 years in the Netherlands i never heard of royal purple. Reading an article about this oil i became curious. In the Netherlands the most common oils are Castrol, Shell..ect The most common oils here are the long life types. Max 30.000km I drive an audi a6 4f v6 2.4 from 2004. I used normaly shell oil. The latest was the 5w40 helix ultra (GTL) the newest type of Shell. Now for the second time i changed the oil with the RP HPS 5w30. It is a great improvement! The engine runs smoother and is more quiet then before. For me it is a very good upgrade compared with Shell 5w40. For me only RP oil for our Audi.........
    Date published: 2015-05-29
    Rated 5 out of 5 by from Street / Track Performace I initially used Royal Purple's Assembly Lube and Royal Purple's Engine Break-in Oil on my 2008 4.6L Modular Ford engine (stroked to 302 Cu In., and Supercharged) After the break-in I switched to regular Royal Purple API 5w30. The engine endured dyno testing and tuning on this oil. After about 2500 miles I switched to Royal Purple's HPS 5w30, and I've continued to use the HPS series oil for about 5000 miles. There is / was a noticeable difference in the sound and smoothness of the engine after the switch to HPS. I would highly recommend the HPS series oil to any enthusiast who cares about their engine.
    Date published: 2014-06-27
    Rated 5 out of 5 by from amazing stuff I have a ford ranger that is supercharged and regularly beat on. I use this stuff on my supercharged 4.0L and its amazing stuff I use it with a ford racing oil filter and I change my oil at 8000km intervals of mostly hard street driving with very limited highway driving, and very hard track driving. and I send my used oil for oil analysis and it tests out better than new mobil 1 my dad uses in his f150. I love RP products! lubricants money can buy. im working on convincing my boss to convert all his dump trucks and heavy equipment to RP products too
    Date published: 2015-04-11
    Rated 5 out of 5 by from Seeing is believing I had just purchased my 99 Cherokee and decided to change the oil in it before winter came around. I had read many reviews about Royal Purple and a lot of the guys I know that race use their products so I thought I would try it out. Wow! What a difference. My mileage went up by 2mpg average! I also noticed less lifter noise out of the 4 Liter and less vibration through the shifter while driving! Switching everything to Royal Purple as their oil changes come due!
    Date published: 2015-05-04
    Rated 5 out of 5 by from Quiet Engine I use the HPS 5w-20 in my Ram 1500 5.7 Hemi MDS. Previously I used Mobil 1 Full Synthetic. For background, the 5.7 hemi engines I have heard all have slight engine noise you can hear from outside the truck. It is just normal valve train sound that can be heard during idle when the engine it at operating temperature. When I switched to Royal Purple HPS it made my engine whisper quiet. I noticed the difference immediately. I also noticed that this oil will clean heavy grease off my hands even after the 12k miles which shows its cleaning ability. It was wonderful not changing my oil every few weeks when I was driving a lot. It is a must to pair this with Royal Purple's oil filter. It keeps the oil very clean! I recommend this oil and noticed a difference. It seems to stay clean for a long time as well with the nice oil filter.
    Date published: 2015-02-06
    Rated 5 out of 5 by from Excellent lubrication and oil life I tried out a case of RP HPS 5w-30 in a high revving lt1 motor and also in a toyota corolla. I found the engines actually were quieter at idle and ran a bit more smoothly. Even at 12,000 miles in the corolla, the oil having been taken out for a sample test, was found to be a better lubricant than new oil out of the bottle of the previous synthetic I was using. It's an excellent product and I'd recommend it over even the regular RP motor oil.
    Date published: 2014-04-05
    Rated 5 out of 5 by from Super Smooth and Quiet Just converted over to Royal Purple in my 2009 Pontiac G6 2.4 ECOTEC. WOW was the only thing I could say for quite a while. The motor is very quiet now, smoother and much more responsive. Picked up about 2-3 MPG. I have to look at the tach now to make sure the car is running being that it is so quiet now. Going to convert the ATF and gear oil next. Thanks for an awesome product. -James E. Miller
    Date published: 2014-07-23
    • 2016-09-27T08:22CST
    • bvseo_cps, prod_bvrr, vn_cps_3.4.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_23
    • loc_en_US, sid_10001_10001_1645360, PRD, sort_relevancy
    • clientName_jegs
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