Originally Posted by dseg42
I received the response below from Amsoil regarding the API certification on their SS oil:
Thank you for contacting AMSOIL with your question.
You are correct in that Signature Series is not API certified because the additive levels exceed normal performance levels. That is why our XL and OE oil are API certified but Signature Series is not so if they stipulate that you must use an API certified oil then potentially Ford could deny coverage. But if our AMSOIL products were the result cause of any type of failure, we stand behind them 100%.
Let me know if you have any other questions or concerns.
The below is stated in the F150 manual:
Use motor oils of the recommended viscosity and display the API Certification Mark for gasoline engines. Do not use oil labeled with API SN service category unless the label also displays the API certification mark.
Kudos to them for being honest. I'd use OE or XL to play it safe while under warranty.
I received the response below from Amsoil regarding the API certification on their SS oil:
Thank you for contacting AMSOIL with your question.
You are correct in that Signature Series is not API certified because the additive levels exceed normal performance levels. That is why our XL and OE oil are API certified but Signature Series is not so if they stipulate that you must use an API certified oil then potentially Ford could deny coverage. But if our AMSOIL products were the result cause of any type of failure, we stand behind them 100%.
Let me know if you have any other questions or concerns.
The below is stated in the F150 manual:
Use motor oils of the recommended viscosity and display the API Certification Mark for gasoline engines. Do not use oil labeled with API SN service category unless the label also displays the API certification mark.
Kudos to them for being honest. I'd use OE or XL to play it safe while under warranty.