The Amsoil Signature Series has been developed to outperform other conventional and synthetic motor oils. It combines premier synthetic technology with Amsoils premium additive package resulting in a formula that exceeds the demands of modern engines.Amsoil signature series fully synthetic engine oil provides outstanding anti wear protection to increase engine life, improve efficiency and improve power. It remains stable at high temperatures and reduces sludge and varnish deposits. It also prevents build up of deposits on pistons maximising engine performance.Recommended for use in petrol engines cars and light trucks.Meets the following specificationsAPI SN (Resource Conserving), SM ; ILSAC GF-5, GF-4 ; ACEA A5/B5, A1/B1; GM LL-A-025, 6094M, 4718M; Ford WSS-M2C205-A; Chrysler MS-6395SAE 5W30