Q: What is a lubricant? A mixture of the base oil and additives which improve the qualities and performance of the base oil. Q: What are lubricants for? To reduce friction between two metal surfaces. To protect mechanical parts from wear and corrosion. To clean and cool them. In engines, the lubricant acts as a sealant between the piston/piston segments and the liners, preventing compression leaks. Q: Can you mix two types of oil together? Q: What is the difference between synthetic and mineral oils? Q: Are synthetic oils better? Q: Why is an oil with synthetic bases better than a mineral oil? Q: What is the most suitable viscosity? Q: Can you change viscosity when you change from one oil to another? Q: Can you mix oils with different viscosities? Q: What is the recommendable length of time between oil changes? Q: What information should be given on the labels of containers? Q: Can topping the oil up be used instead of changing it? Q: When the oil is black, does that mean it is in poor condition? Q: Do I have to change the oil filter when I change the oil? Q: Can I store oil? Might it deteriorate during storage? Q: Do all A2 or A3 oils have the same characteristics? Q: Is quality A1 and B1 better? Q: What should I do with used oil? Q: Can I add additives in oil? Q: Can I put in my gear-box the same oil as in my engine? Q: Can I use diesel engine oil in a petrol engine, and vice versa? Q: Can I mix two different types of oil? Q: Can I use car engine oil in my motorcycle? Q: What causes oil pressure to drop? Q: Does the oil have to be topped up? Q: What does a lubricant do? Q: How can you judge lubricant performance? Q: What are the advantages of a quality oil? Q: What is the advantage of keeping up with the new technologies? Q: Why choose a synthetic oil? Q: What are the advantages of a multigrade oil? Q: Which oil should we use in turbo compressed vehicles? Q: Are all oils adapted to vehicles equipped with a catalytic converter? Q: Why change the oil? Q: How often should oil be changed? Q: Can you chose another viscosity grade when changing oil? Q: What type of oil packaging should I choose? Q: Can I stock oil ? Will it deteriorate? Q: What should I do with used oil? Q: Can I add additives in oil? Q: Can I put in my gear-box the same oil as in my engine? Q: Can I use diesel engine oil in a petrol engine, and vice versa? Q: Can I mix two different types of oil? Q: Can I use car engine oil in my motorcycle? Q: What causes oil pressure to drop? Q: Does the oil have to be topped up? Q: What does a lubricant do? Q: How can you judge lubricant performance? Q: What are the advantages of a quality oil? Q: What is the advantage of keeping up with the new technologies ? Q: Why choose a synthetic oil? Q: What are the advantages of a multigrade oil? Q: Which oil should we use in turbo compressed vehicles? Q: Are all oils adapted to vehicles equipped with a catalytic converter ? Q: Why change the oil? Q: How often should oil be changed ? Q: Can you chose another viscosity grade when changing oil? Q: What should I do with used oil? Q: Can I stock oil? Will it deteriorate?