Kendall GT-1 Competition 20w-50 | 12/32 Ounce Bottles

Kendall GT-1 Competition 20w-50 | 12/32 Ounce Bottles

25.00 LBS

Kendall GT-1 Competition 20w-50 Motor Oil with LiquiTek in a Case of 12 Quart Bottles 

Kendall GT-1 Competition 20w-50 Motor Oil is a conventional automotive engine oil for high-performance and competition engines.  Kendall GT-1 Competition Motor Oil with LiquiTek SAE 20W-50  contains a boosted level of zinc dialkyldithiophosphate (ZDDP) additive to provide additional wear protection and enhanced oxidation resistance in the most demanding applications. It is particularly recommended for use in turbocharged engines and in high-performance engines with flat-tappet camshafts, especially during the critical break-in period. 

Verify this is the right oil for your vehicle here

 *LiquiTek is Kendall's latest additive formulation replacing the previous Liquid Titanium additive formulation. 


  • Conventional gasoline-fueled passenger cars 
  • Turbocharged gasoline engines 
  • Light trucks and sport utility vehicles 
  • Competition engines and high-performance street engines 

Specifications and Approvals 

  • API Service SN PLUS 

27 Reviews | Write a Review.

  • 5
    Great price and quick service

    Posted by n/a on May 20 2022

    I use the oil in my Austin Healey. It is the best value for use in my car.

  • 5
    Great Service

    Posted by n/a on May 09 2022

    Had the product arrive before expecting !!! Great

  • 5
    1985 Porsche 911 Carrera 3.2

    Posted by Paul Soares on Dec 02 2021

    Preferred motor oil o use in my classic 911

  • 5
    Kendall GT-1 Competition Motoroil

    Posted by Randy May on Jul 05 2021

    Best there is!

  • 5
    Petroleum Service Co.

    Posted by Peter Stetson on Jun 23 2021

    Customer service is the standard that all service companies should strive to achieve. My experience was an excellent experience. Thank you

  • 5
    Great price

    Posted by n/a on Aug 30 2020

    Best price i can find

  • 5
    Kendall GT-1 20W=50 Oil

    Posted by Dan on Jul 06 2020

    Great Oil and Very Fast Shipping

  • 5
    20W50 GT 1

    Posted by Bill Goehring on Apr 07 2020

    Best in class by far! Use it in my Race engines and working great in my Motorcycles as well

  • 5
    No Oil better than Kendall GT-1

    Posted by Randy May on Nov 13 2019

    I began using Kendall GT-1 Competition Motor Oil back in the late 60's early 70's. I have used it in all of my vehicles and equipment such as farm tractors, etc. consistently. I have never lost an engine, never had an "oil eater", never had valve train noise including lifters. Absolutely the finest oil one can put in a combustion engine, baring none!

  • 5
    Best oil for Flathead Fords

    Posted by Walt on Aug 29 2019

    Keeps my Flathead motor running well.

  • 5

    Posted by TR on Mar 29 2019

    Been using Kendall GT in my Harleys for years. 70W, 50W & 20W50. Current Harley 28 years old.

  • 5
    Best for a Mercedes 560SEC which likes higher zinc

    Posted by James on Mar 04 2019

    I have a 1990 560SEC which has a flat tappet camshaft, calling for oil with higher zinc content. I didn't want to go with a partial synthetic (Brad Penn, which is also substantially more money $30 per case plus more in shipping.) I liked that this has titanium as an additive. A very modern oil that works well on "chronologically gifted" cars like mine with 332K miles on it. I will tell you that I had Castrol 20-50 in it with Liqui Moly MoS2 anti-friction as a separate additive. When I started the car with this new mixture of Kendall it was like a night and day difference in my engine smoothing out! Can't say enough good things!

  • 5
    Best non synthetic oil out there for your classic 911

    Posted by Evan on Sep 15 2018

    I have used this oil in both of my air-cooled Porsches and it has all the right stuff from an additive package and viscosity range for these cars. The extra zinc gives peace of mind and the price is very competitive. I have done Blackstone analysis on both cars and very pleased with how it holds up.

  • 5

    Posted by George on Aug 20 2018

    None better!

  • 5
    Best oil

    Posted by Bud Moy on Jul 07 2018

    Hard to find ,but nice its available on line. Thanks to PSC Blessings from Bud

  • 5
    Good Stuff

    Posted by Marc on May 13 2018

    But hard to find, actually impossible, where I live so I have to order it on-line from PSC. That said, I get what I want and it's no more expensive than if I could get it locally...I WIN!!! I like using Kendal because way back when, I found that a lot of motorcycle shops used and recommended it. Air cooled motorcycle engines can experience greater temperature stress than liquid cooled cars for the most part. So they used this for a reason. If it's good enough for them it's great for my cars...and bikes.

  • 5
    Kendall 20w/50 comp. oil

    Posted by rocky on May 11 2018

    good stuff been using Kendall for years. why don't you carry Kendall 50 comp. oil ?

  • 5
    1974 911

    Posted by Jack on Apr 24 2018

    1974 911 requires 20W-50 oil with high ZDDP content. Kendall GT-1 is the best oil I have found that meets or exceeds all the requirements for older air cooled 911's. PSC has good prices and excellent service.

  • 5
    well satistisfied with product and supplier

    Posted by charlie ware on Apr 13 2018

    very good product and priced reasonably will continue to use this product thru this supplier

  • 5
    limited choices for zddp

    Posted by nize on Apr 02 2018

    if you're looking for conventional oil with zddp, the choices are limited without going to the outrageously priced boutique oil market. this is a reasonably priced product that gets the job done. let's hope they don't fall victim to price gouging.

  • 4
    Quality Product

    Posted by L P Racing on Mar 05 2018

    Very pleased with the quality of this oil. Price was good for this product.

  • 5
    Very fast shipping and best price

    Posted by Alessandro Magno on Jan 29 2018

    I used to buy from amazon by I end up paying $20dol more for the same stuff ! Love the price and the product is the best so far for my race cars and muscle cars

  • 5
    Best quality oil for the price

    Posted by Dave on Oct 27 2017

    I use this oil in my two Austin Healeys. The oil pressure is better and it has the zinc needed to keep the lifters from wearing out early.

  • 5
    Great Motorsport Oil

    Posted by Guillermo on Oct 13 2017

    I've run this oil in my twinturbo Z trackcar for 2 years straight. Its the right price so you can constantly change it between events without breaking the bank and its got the zinc your engine needs when your pushing it to the limit.

  • 5
    Performance oil

    Posted by Charlie Ware on Jun 12 2017

    Your customer service is second to none prompt shipping will buy again thx regards

  • 5
    very good oil at good price

    Posted by Roger on Jun 04 2017

    use this oil in a methanol fueled 305 sprint car engine with flat tappet camshaft. works very well with the high zddp content.

  • 5
    Recommended by engine builder for my boat motor

    Posted by To. on May 23 2017

    Great oil at a low price

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