Woodlands Rd , after Stagmont Ring Road , before Yew Tee industrial .
There's a Caltex .
U buy coupons from them .
Per wash is only $1.90 .
But some day of the week , they charge $1 more .
Like i know Wednesday , Saturday And Sunday , i think $1 more .
The last time i bought coupons from them is last year , $50 , 28 coupons . One free wash .