SIGNATURE SERIES OIL PROTECTS ENGINES FROM LOW-SPEED PRE-IGNITION

OEMs have been aggressively downsizing engines to meet strict fuel economy and emissions standards while improving power and torque. Most new engines today use some combination of turbochargers, direct-fuel injection and variable valve timing to make more power than their larger counterparts while delivering improved fuel economy. This scenario seems like all upside for drivers. But today’s smaller, hotter-running engines pose significant challenges to lubricants. The latest is a phenomenon called low-speed pre-ignition (LSPI), also known as “super knock,” which can destroy pistons and connecting rods.

What Is LSPI?

LSPI is another version of engine knock, which has been around since engines were invented. In this case, it occurs under low-speed, high-torque conditions in turbocharged gasoline direct-injected engines – like when you’re taking off from a stoplight. LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. This form of pre-ignition is more destructive than typical engine knock.

No Magic Bullet

Just as your engine relies on a balanced network of components to function, the motor oil needed to protect it requires additives with the right qualities at the right quantities. While adding more of one ingredient or reducing another seems simple enough, small composition changes can have big impacts. We were determined to find a solution to the LSPI problem without sacrificing the performance of Signature Series in any way.

GM SPI Test

OEMs like GM have addressed the issue by designing tests to determine a motor oil’s ability to prevent LSPI. The GM SPI Test records the number of peak pressure events during high-load

operation in a turbocharged engine over a five-hour period. Passing the test is required to meet the GM dexos1® Gen 2 specification.

Test Parameters

Engine GM 2.0L EcoTec, LHU

Duration Five hours

Measures Number of peak pressure pre-ignition events

Simulates Turbocharged vehicle operating in high torque and at low speed

Requirement At least three of the five total tests with zero peak pressure LSPI

events and no tests with more than two peak pressure events

Perfect Score

We armed Signature Series with an advanced detergent system that protects against harmful deposits and LSPI. Signature Series Motor Oilachieved 100 percent protectionagainst LSPI in the engine test required by the GM dexos1 Gen 2 specification – zero occurrences were recorded throughout five consecutive tests.

API SN PLUS Specification

API SN PLUS is a recently released specification that was requested by the automobile industry to protect passenger vehicles from LSPI. AMSOIL anticipated this change, and the current

formulations of Signature Series, XL and OE synthetic motor oil all meet or exceed the specification. Look for updated product labels featuring the new API “donut” in the near future. You can be confident that AMSOIL synthetic motor oils protect modern engines against LSPI, helping your vehicle deliver years of reliable service. For more information on the dangers of LSPI, visit www.amsoil.com/lspi.

 

1Based on zero LSPI events in five consecutive tests of AMSOIL Signature Series 5W-30 motor oil in the LSPI engine test required by the GM dexos1®  Gen 2 specification.

All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

05Jul 2019

AMSOIL Dirt Bike Crown Winner -Chase Sexton Wins Again Lindsay Premo|May 08, 2019 8:52 AM As I plopped down on the sofa with my second cup of coffee Sunday morning, I tuned the DVR to watch the Supercross finals from Vegas (#centraltimezoneprobs). I knew two things from watching heats and LCQs the night before: 1. […]

03Jul 2019
cetane boost mixed with lubricant

Injector’s Require It – Diesel Fuel Additive Only overlooked by those who don’t understand the critical fuel issues. Stock up and enjoy your diesel to the N’th degree!! New Diesel Injector Clean + Cetane Boost Available Now, Diesel Injector Clean + Cetane Boost (ADS) combines the superior detergency and improved lubricity of AMSOIL Diesel Injector […]

02Jul 2019

Weed Eater Won’t Start? Try This John Baker|Jun 19, 2019 9:28 AM No matter what you call it – weed eater, weed whacker, string trimmer – chances are at some point it won’t start. Few things are more annoying than destroying your shoulder trying to start the weed eater when there’s work to do. Fortunately, […]

01Jul 2019

How to Get Your Car Noticed at a Car Show (and Maybe Even Win an Award) Jamie Gibson|May 16, 2019 12:01 PM In November 1900, the Automobile Club of America sponsored the first “modern car show”, which took place in New York City. Referenced today as “The Grandmother of All Auto Shows”, it featured… 66 […]

01Jul 2019

MAXIMIZING THE SHELF LIFE OF AMSOIL PRODUCTS AMSOIL synthetic lubricants are designed to retain their original performance after a reasonable period of time in your storeroom. Proper storage ensures the freshest, most effective products possible. From fresh fruit to batteries, most consumable products have a shelf life. Synthetic lubricants are no different. AMSOIL engineers products […]

01Jul 2019

Team Hybrid Sets the Import Standard Jamie Gibson|May 01, 2019 1:39 PM It’s no small feat to organize a group of tuner enthusiasts and turn it into a well-respected car club. Never mind one that is capable of steady accolades, awards and reverence in a highly-competitive scene. That’s exactly what James Lin, Team Hybrid Founder […]