oil quality - OilSpec Guide

OEM Approvals

When Dealers Use ‘House Oil’: What You Should Ask (Politely)

questions about dealer fees

Many car owners wonder what to ask when dealers use house oil; find out the key questions to protect your engine and ensure quality.

OilSpec Guide Team
March 8, 2026

essential fluid measurement categories

Testing & Measurement

The Only 7 Fluid Measurements Worth Tracking Regularly

I’m here to reveal the seven essential fluid measurements that can help you maintain…

OilSpec Guide Team
March 25, 2026

top garage oil stain removers

Vetted

15 Best Oil Stain Remover Machines for Garage Floors in 2026

Get guided through the top 15 oil stain remover machines for garage floors in 2026 to…

OilSpec Guide Team
March 25, 2026

top 15 battery powered transfer pumps

Vetted

15 Best Battery Powered Fluid Transfer Pumps for 2026

Keen to find the top battery-powered fluid transfer pumps of 2026? Discover the best…

OilSpec Guide Team
March 25, 2026

oils lack oem certification

Label & Documentation

Why Some Oils Don’t List OEM Approvals Even If They’re High Quality

Premium oils often skip OEM approvals for innovation and flexibility; discover why…

OilSpec Guide Team
March 25, 2026