If you want a natural tan, the type of oil or tanning lotion you put on should not have an effect on the colour of a tan. Your tan is caused by pigments (melanins) in your own skin which will be various shades of dark red to brown depending on the individual. Normally at the start of a tan you might get a bit redder because there is a certain amount of sunburn when you have not begun to produce enough melanin to give you the protection from the sun. UV Protection is the natural purpose of a tan. You can get tanning lotions that dye the skin and these might give a red unnatural tan: http://www.sunless.com/
Fooling around with tanning can be dangerous and cause skin cancer, so check out: http://www.fda.gov/cdrh/tanning.html
making a small donation to science.ca.